ZKTeco SenseFace 4 Series User Manual

Introduction

Thank you for choosing ZKTeco's product. Please read the instructions carefully before operation to ensure the product is functioning properly. The images shown in this manual are for illustrative purposes only.

For further details, please visit ZKTeco's website: www.zkteco.com.

Copyright © 2025 ZKTeco CO., LTD. All rights reserved.

Without the prior written consent of ZKTeco, no portion of this manual can be copied or forwarded in any way or form. All parts of this manual belong to ZKTeco and its subsidiaries.

Trademark

ZKTeco is a registered trademark of ZKTeco. Other trademarks involved in this manual are owned by their respective owners.

Disclaimer

This manual contains information on the operation and maintenance of ZKTeco equipment. ZKTeco offers no warranty regarding the completeness of any information contained in this manual. ZKTeco does not assume responsibility for any errors or omissions. The user assumes the entire risk as to the results and performance obtained from using the information. ZKTeco shall not be liable for any damages arising out of the use of the information contained in or referenced by this manual.

ZKTeco periodically changes the information herein and reserves the right to add, delete, amend or modify the information from time to time. ZKTeco shall not be responsible if the equipment malfunctions due to non-compliance with instructions, operation beyond rate limits, or operation in different conditions. The product will be updated from time to time without prior notice. The latest operation procedures and relevant documents are available on http://www.zkteco.com.

ZKTeco Headquarters

Address: ZKTeco Industrial Park, No. 32, Industrial Road, Tangxia Town, Dongguan, China.

Phone: +86 769 - 82109991

Fax: +86 755 - 89602394

For business related queries, please write to: sales@zkteco.com.

To know more about global branches, visit www.zkteco.com.

About the Company

ZKTeco is a leading manufacturer of RFID and Biometric readers, offering products for Access Control, Facial Recognition, Elevator access, Turnstiles, License Plate Recognition, and Consumer products. Its security solutions are localized in over 18 languages. ZKTeco controls manufacturing, product design, assembly, and logistics at its ISO9001-certified facility.

Founded in 2007, ZKTeco has been a pioneer in biometric verification technology, developing SDKs and building an identity and smart security ecosystem. It is recognized as a National High-tech Enterprise and holds numerous patents.

About the Manual

This manual introduces the operations of the SenseFace 4 Series. Figures are for illustration purposes only and may not be exactly consistent with actual products. Features and parameters marked with a specific symbol are not available in all devices.

Document Conventions

GUI Conventions

For Device

Symbols Convention

Data Security Statement

ZKTeco collects personal information to improve its goods and services, treating user privacy with care. Users must read and understand the privacy policy before using ZKTeco products. Users must comply with applicable data protection laws, including implementing protective measures like reasonable rights management and strengthening physical security.

Safety Measures

1. Read, follow, and retain all safety and operational instructions.
2. Adhere to all warnings on the unit and in the instructions.
3. Use only manufacturer-recommended accessories.
4. Do not place the device on an unstable stand or frame.
5. Do not attempt to service the unit yourself; refer to qualified personnel.
6. Disconnect power and refer to service personnel if the cord/connection is affected, liquid is spilled, an item is dropped, the system is exposed to water/inclement weather, or the system is not operating normally.
7. When replacement parts are required, use only parts provided by the supplier.
8. Ask service technicians to perform safety checks after service or repair.
9. Operate the system only from the specified power source.
10. Install external lightning conductors to protect against electrical storms. Devices should be installed in areas with limited access.

1 Instruction for Use

Finger Positioning

Recommended fingers: Index, middle, or ring fingers. Avoid: Thumb or pinky fingers, as they are difficult to position correctly.

Note: Use the correct method for pressing fingers onto the fingerprint reader for registration and identification to avoid recognition issues. ZKTeco assumes no liability for recognition issues resulting from incorrect usage.

Standing Position, Posture and Facial Expression

Recommended distance: 0.3 m to 1.7 m for users between 1.55 m and 1.85 m height. Users may adjust their position slightly forward or backward to improve facial image quality.

Recommended posture and facial expression: Maintain a natural facial expression and standing posture during enrollment and verification.

Face Template Registration

Ensure the face template is centered on the screen. Face towards the camera and remain still. The registration interface shows a progress bar. Maintain a distance of 40 cm to 80 cm. Avoid changing facial expressions (smiling, grimacing, winking). Do not cover eyes or eyebrows. Do not wear hats, masks, sunglasses, or eyeglasses. Register one person at a time. Users wearing glasses are recommended to register templates both with and without glasses.

Authentication Recommendation: Ensure the face template appears within the guideline. If glasses are changed, authentication may fail. If a part of the face is covered, authentication may fail. Allow the device to recognize eyebrows and the face.

Standby Interface

After connecting power, the standby interface is displayed. Tap an icon to enter the User ID input interface. If no Super Administrator is set, tapping an icon allows menu access. After setting a Super Administrator, verification is required to enter menu functions. It is recommended to register a Super Administrator first.

Punch state options can be shown on the standby interface. Tapping anywhere on the screen (except icons) reveals six shortcut keys. Press a key to select the current punch state, displayed in green. This function requires the device type to be set as an attendance terminal and punch state options to be enabled in '7.4 Punch States Options'.

Virtual Keyboard

The device supports input in Chinese, English, numbers, and symbols. Use 'EN' to switch to English, '123' for numeric/symbolic keyboards, and 'ABC' to return to alphabetic. Tapping an input box displays the virtual keyboard. Use 'ESC' to exit.

Verification Mode

1.6.1 Fingerprint Verification

Note: This function is only for SenseFace 4A.

1:N Fingerprint Verification Mode: Compares the current fingerprint with all stored fingerprint data. Activated by placing a finger on the scanner. Follow recommended finger positioning.

1:1 Fingerprint Verification Mode: Compares the current fingerprint with fingerprints linked to the entered User ID. Access this mode by tapping the fingerprint icon on the main screen, entering the User ID, and pressing OK. If face template and password are also registered, select the fingerprint icon from the available verification methods.

1.6.2 QR Code Verification

Note: This function is only for SenseFace 4C.

Tap 'Mobile Credential' on the ZKBio Zexus Mobile Page to display a QR code containing employee ID and card number information. This QR code can be used for contactless authentication.

1.6.3 Card Verification

1:N Card Verification: Compares the card number with all registered card numbers in the device.

1:1 Card Verification: Compares the card number with the number associated with the entered User ID. Access this mode by tapping the card icon on the main interface, entering the User ID, and pressing OK. If other verification methods are registered, select the card icon.

1.6.4 Facial Verification

1:N Facial Verification: Compares the acquired facial images with all registered face template data.

1:1 Facial Verification: Compares the captured face template with the facial template related to the entered User ID. Access this mode by tapping the face icon on the main interface, entering the User ID, and pressing OK. If other verification methods are registered, select the face icon.

1.6.5 Password Verification

Compares the entered password with the registered password for the given User ID. Access this mode by tapping the password icon on the main screen, entering the User ID, and pressing OK. If other verification methods are registered, select the password icon.

1.6.6 Combined Verification

Offers multiple verification methods for increased security. Up to 21 combinations are possible.

Symbol Definition:

• / (or): Compares entered verification with related stored template.
• + (and): Compares entered verification with all stored templates.

Procedure: Combined verification requires personnel to register all required verification methods. If a user has only registered one method but the device requires multiple, verification will fail.

2 Main Menu

Tap on the Standby interface to enter the Main Menu. The menu includes:

Note: When using the product for the first time, set administrator privileges via 'User Mgt.' or edit user permissions as a super administrator. If no administrator is set, a prompt will appear each time the device menu is entered.

3 User Management

User Registration

Access 'User Mgt.' from the main menu, then tap 'New User'.

3.1.1 User ID and Name

Enter User ID and Name. A username can contain up to 34 characters. The User ID defaults to 1-14 digits and cannot be modified after initial registration. A 'Duplicated!' message indicates the User ID already exists.

3.1.2 User Role

Set the user role to 'Normal User' or 'Super Admin'. Super Administrators have all management privileges. Normal Users have limited privileges. User Defined Roles allow custom permissions. If the Super Admin role is selected, identity authentication is required to access the main menu.

3.1.3 Fingerprint

Tap 'Fingerprint' to enter the registration page. Select the finger and press it on the reader three times. Green indicates successful enrollment.

3.1.4 Face Template

Tap 'Face' in the 'New User' interface. Face the camera, position your face within the guiding box, and remain still. A progress bar indicates registration status. 'Enrolled Successfully' is displayed upon completion. 'Duplicate Face' message appears if the face is already registered.

3.1.5 Card

Tap 'Card' in the 'New User' interface. Swipe the card under the reading area for registration. 'Duplicate Card' message appears if the card is already registered.

3.1.6 Password

Tap 'Password' in the 'New User' interface. Enter and re-enter the password, then tap OK. 'Password not match!' prompts if passwords differ. Passwords typically range from 6 to 8 digits.

3.1.7 Profile Photo

Tap 'Profile Photo' to access the camera. Tap the camera icon to take a photo. The captured photo is displayed. The system automatically captures a photo as the user profile photo during face template registration if no profile photo is explicitly registered.

3.1.8 Access Control Role

Sets door access privileges. Assign users to 'Access Group' for management. New users default to Group 1. Users can be reassigned. Up to 99 Access Control groups are supported. Time periods can be set for access. Duress fingerprints can be specified to trigger an alarm upon use.

Search for Users

Navigate to 'User Mgt.' > 'All Users'. Tap the search bar to enter a keyword (User ID, surname, or full name) to find user information.

Edit User

From the 'All Users' list, tap the required user and then 'Edit'. User ID cannot be modified during editing.

Delete User

From the 'All Users' list, tap the required user and then 'Delete'. Options include deleting the entire user, or specific data like fingerprint, face, password, card number, or profile photo.

Display Style

Access 'User Mgt.' > 'Display Style' to choose between 'Multiple Line' or 'Mixed Line' display for the user list.

4 User Role

User Role settings allow assigning specific permissions to users. Access 'User Role' from the main menu, then 'User Defined Role' to set custom permissions. Enable 'Defined Role', enter a 'Name', and select privileges from the menu functions and sub-menus. If no Super Administrator is registered, a prompt will appear when enabling User Role.

5 Communication Settings

Access 'COMM.' from the Main Menu to configure network, serial, PC, wireless, cloud, Wiegand, and network diagnosis settings.

Network Settings

Configure Ethernet settings for PC communication. Options include displaying network status, IP Address, Subnet Mask, Gateway, DNS, and DHCP. The default IP is 192.168.1.201.

Serial Comm

Facilitates communication via serial port (RS485/Master Unit). Options include 'No Using', 'RS485(PC)', and 'Master Unit'. Baud Rate settings (115200, 57600, 38400, 19200) affect communication speed and reliability.

PC Connection

Configure communication settings for PC connection. Includes 'Device ID' (1-254) and 'TCP COMM. Port' (default 4370). 'HTTPS' can be enabled for secure network transmission.

Wireless Network

The device supports Wi-Fi for wireless data transmission. Wi-Fi is enabled by default. Users can search for available networks, connect by entering the password, or add networks manually. Advanced settings include DHCP, IP Address, Subnet Mask, Gateway, and DNS for the Wi-Fi network.

Cloud Server Setting

Connects to the ADMS server. Options include enabling 'Domain Name' or using an 'IP Address' for the Server Address, setting the Server Port, and enabling 'Proxy Server' with its IP and port.

Wiegand Setup

Configure Wiegand input and output parameters. The interface is shared, allowing selection between input or output. Options include Wiegand Format (26, 32, 34, 36, 37, 50, 64 Bits), Pulse Width, Pulse Interval, and ID Type (User ID or Card Number).

Wiegand Input Formats:

• Wiegand26: 26 bits, E + 12 bits Card Number + O.
• Wiegand26a: 26 bits, E + 8 bits Site Code + 16 bits Card Number + O.
• Wiegand34: 34 bits, E + 16 bits Card Number + O.
• Wiegand34a: 34 bits, E + 8 bits Site Code + 16 bits Card Number + O.
• Wiegand36: 36 bits, O + 16 bits Device Code + 16 bits Card Number + E.
• Wiegand36a: 36 bits, E + 17 bits Device Code + 16 bits Card Number + O.
• Wiegand37: 37 bits, O + 16 bits Manufacturer Code + Site Code + 16 bits Card Number + E.
• Wiegand37a: 37 bits, E + 3 bits Manufacturer Code + 10 bits Device Code + 6 bits Site Code + 16 bits Card Number + O.
• Wiegand50: 50 bits, E + 16 bits Site Code + 32 bits Card Number + O.

Key: C=Card Number, E=Even Parity, O=Odd Parity, F=Facility Code, M=Manufacturer Code, S=Site Code.

Wiegand Output:

Includes SRB control, Wiegand Format selection, Output Bits, Failed ID transmission, Site Code configuration, Pulse Width, Pulse Interval, and ID Type selection.

Network Diagnosis

Set IP address diagnostic parameters and start the diagnostic process.

6 System Settings

Configure system parameters to optimize device performance.

Date and Time

Set date and time manually or via NTP synchronization. Options include 24-Hour Time format, Date Format, and Daylight Saving Time settings.

Access Logs Settings/Attendance

A&C Terminal: Configure 'Camera Mode' (No Photo, Take photo no save, Take photo and save, Save on successful, Save on failed), 'Display User Photo', 'Alphanumeric User ID', 'Access Logs Alert', 'Periodic Del of Access Logs/T&A Photo/Blocklist Photo', 'Authentication Timeout', and 'Recognition Interval'.

T&A Terminal: Configure 'Duplicate Punch Period', 'Camera Mode', 'Display User Photo', 'Alphanumeric User ID', 'Attendance Log Alert', 'Periodic Del of T&A Data/Photo/Blocklist Photo', 'Authentication Timeout', and 'Recognition Interval'.

Face Template Parameters

Configure Face Recognition thresholds (1:N, 1:1), Face Enrollment Threshold, Image Quality, Facial Recognition Distance, Anti-spoofing (NIR, Binocular Live Detection), Face AE, WDR, Anti-flicker Mode, and Face Algorithm settings.

Fingerprint Parameters

Configure Fingerprint thresholds (1:1, 1:N), FP Sensor Sensitivity, 1:1 Retry Attempts, Fingerprint Algorithm, and Fingerprint Image display options (Show for enroll, Show for match, Always show, None).

Device Type Setting

Set the device as a Time Attendance (T&A PUSH) or Access Control (A&C PUSH) terminal. Changing the device type will delete all data and restart the device.

Security Setting

Configure 'Standalone Communication', 'SSH' (enabled by default), 'User ID Masking', 'Display Verification Name', 'Display Verification Mode', and 'Save Photo as Template' (disabling requires re-registration after algorithm upgrade).

USB Upgrade

Upgrade the device's firmware using a file on a USB drive. Ensure the USB drive contains the correct upgrade file and is FAT32 formatted.

Update Firmware Online

Enable online firmware updates. The device checks for updates and prompts for installation if a newer version is available.

Factory Reset

Restore device settings to factory defaults. This function does not clear registered user data.

7 Personalize Settings

Customize interface, voice, bell schedules, punch states, and shortcut key mappings.

User Interface Settings

Customize the main interface appearance. Options include 'Wallpaper', 'Language', 'Menu Timeout', 'Idle Time to Slide Show', 'Slide Show Interval', 'Idle Time to Sleep', and 'Main Screen Style'.

Voice Settings

Configure 'Voice Prompt' and 'Touch Prompt' toggles, and adjust 'Volume' (0-100).

Bell Schedules

Set up bell schedules by adding new schedules, defining 'Bell Status', 'Bell Time', 'Repeat' counts, 'Ring Tone', and 'Internal Bell Delay'. View, edit, or delete existing schedules.

Punch States Options

Configure 'Punch State Mode' with options like 'Off', 'Manual Mode', 'Auto Mode', 'Manual and Auto Mode', 'Manual Fixed Mode', and 'Fixed Mode'.

Shortcut Key Mappings

Define shortcut keys for attendance status or functional keys. Configure the function of a shortcut key as a 'punch state key' or 'function key'. For punch state keys, set the punch state value, name, and switch time according to the 'Punch States Options'.

8 Data Management

Delete various types of data from the device, including Access Records/Attendance Data, Attendance Photos, Blocklist Photos, User Data, User Photo Templates, Wallpapers, Screen Savers, and Contact Lists. Data can be deleted by time range.

Delete Data

Options include deleting specific data types or 'Delete All Data'. 'Delete Admin Role' and 'Delete Access Control' options are also available.

9 Intercom

Configure intercom parameters including SIP, Doorbell, and ONVIF settings. The device supports video intercom via LAN or SIP server.

SIP Settings

Local Settings: Configure SIP Server (enable/disable), Master Account, Backup Account, Device Port, Local Information (Device Type, location details), Transport Protocol, Call Contact List, and Call Number Type (Room Number or SIP Account Number).

Audio Options: Select audio encoder (PCMU, PCMA).

Video Options: Configure Video Resolution, Video Code Stream, Video Frame Rate, and H264 Encoder.

Call Options: Set Calling Delay, Talking Delay, Call Volume, Call Type (Voice only or Voice+Video), Call Button Style, Auto Answer Settings, Auto-Answer Delay Time, and Encryption.

Contact List: In SIP Server mode, the contact list is synchronized from ZKBio CVAccess Server. When SIP server is disabled, indoor monitor room numbers and call addresses can be added manually.

Calling Shortcut Settings: Enable and define shortcut keys for calling Management Center, or set up 'Standard Mode' (ROOM1-4) or 'Direct Calling Mode' for quick calls.

Advanced Settings: Configure DTMF Type and DTMF values.

Doorbell Setting

Options include disabling the doorbell button or setting it for 'Video Intercom Only'.

Connect the Wireless Doorbell:

Power on the doorbell, press and hold the music button until the indicator flashes. Click the device icon on the interface; if the doorbell rings, the connection is successful. The device can generally connect to one wireless doorbell.

Unbinding the Wireless Doorbell:

Power off the doorbell, then re-install batteries while holding the music button until the indicator is on.

ONVIF Settings

Note: Requires connection with a Network Video Recorder (NVR).

Set the device to the same network segment as the NVR. Configure ONVIF settings including 'Enable Authentication', 'User Name', 'Password', and 'Server Port'. On the NVR, add the device by refreshing and selecting it from the list, then inputting the credentials configured on the device.

10 Access Control

Configure access control parameters such as door opening schedules, lock control, and other settings.

Access Control Options

Set 'Gate Control Mode', 'Door Lock Delay', 'Door Sensor Delay', 'Door Sensor Type' (None, Normal Open, Normal Closed), 'Verification Mode' (e.g., Fingerprint Only, Card Only), 'Door Available Time Period', 'Normal Open Time Period', 'Master Device'/'Slave Device' settings, 'Auxiliary Input Configuration', 'Verify Mode by RS485', 'Speaker Alarm', and 'Reset Access Settings'.

Time Rule Setting

Define up to 50 Time Rules, each with 10 Time Zones. Each time zone can have up to three time periods (HH MM-HH MM format). Access is valid if the verification time falls within any defined period. Setting End Time earlier than Start Time prohibits access all day.

Holidays

Set special access times for holidays. Add, edit, or delete holiday access settings that apply to all employees.

Access Groups

Note: Only available for T&A PUSH.

Manage user groupings and assign users to different access groups. Settings like access time zones apply to all group members. Users can be assigned to multiple groups. Up to five time zones can be set per group. Newly enrolled users default to Access Group 1.

Combined Verification

Arrange access groups into door-unlocking combinations for enhanced security. Combinations can include members from one or multiple access groups. Example: Combination 1 = (Group 1, Group 3, Group 5, Group 6, Group 8). To delete a combination, set all its members to '0'.

Anti-passback Setup

Requires two devices (master and slave) communicating via Wiegand. When enabled, check-in and check-out records must match. Options include 'No Anti-passback', 'Out Anti-passback', 'In Anti-passback', and 'In/Out Anti-passback'.

Duress Options

Configure duress verification settings. Options include 'Alarm on Password', 'Alarm on 1:1 Match', 'Alarm on 1:N Match', 'Alarm Delay', and 'Duress Password'. Using a duress password or fingerprint triggers an alarm while unlocking the door.

11 USB Manager

Import/export user information, access data, and other data using a USB drive. Ensure the USB drive is FAT32 formatted for downloads.

USB Download

Download 'Access Records', 'User Data', 'User Portrait', 'Attendance Photo', and 'Blocklist Photo' to a USB disk.

USB Upload

Upload 'Screen Saver', 'Wallpaper', 'User Data', and 'User Portrait' from a USB disk to the device.

12 Attendance Search

Check access records and attendance logs. Search by User ID or for all users within a specified time range. View details of selected logs.

13 Autotest

Automatically test device modules: LCD, Audio, Microphone, Fingerprint Sensor, Camera, and Real-Time Clock (RTC).

14 System Information

View device capacity (storage for users, photos, records), device information (name, serial number, MAC address, algorithms), firmware version, and privacy policy.

15 Connect to ZKBio CVAccess Software

Set the Communication Address

Device Side: Configure IP address and gateway via 'COMM. > Ethernet'. Set server address and port via 'COMM. > Cloud Server Setting'.

Software Side: Configure ADMS service port in 'System > Communication Management > Communication Monitor'.

Add Device on the Software

Use 'Access > Device > Search' to find devices. Add devices by selecting them and configuring details like Icon type, Area, and Level.

Add Personnel on the Software

Use 'Personnel > Person > New' to register users. Synchronize data to devices via 'Access > Device > Control > Synchronize All Data to Devices'.

Mobile Credential (SenseFace 4C)

Enable QR Code in ZKBio CVAccess ('System > System Management > Parameters'). Enable APP Login for personnel. Use the ZKBio Zexus Mobile App to log in as Personnel and access 'Mobile Credential' to generate a QR code for contactless authentication.

16 Connect to ZKBioTime Software

Set the Communication Address

Device Side: Configure IP address and gateway via 'COMM. > Ethernet'. Set server address and port via 'COMM. > Cloud Server Setting'.

Software Side: Devices are automatically added. Assign custom areas in 'Device Module > Device'.

Add Personnel on the Software

Use 'Personnel > Employee > Add' to register users. Synchronize data to devices via 'Device > Device > Data Transfer > Sync Data to Device'.

17 SIP Video Intercom

Local Area Network Use

Ensure SIP Server is disabled on the device. Configure the indoor monitor (VT07-B01) with IP Address and Gateway. Add the device on the indoor monitor via 'Setting > Advance Setting > Device Manage'. On the device, configure 'Intercom > SIP Settings > Contact List' to add indoor monitors. Enable video intercom by tapping the call icon and entering the indoor monitor's number or IP address.

Call Contact List

Enable 'Call Contact List' in 'SIP Settings > Local Settings'. Tap the call icon on the device to open the contact list and select an indoor monitor to call.

Custom the Calling Shortcut Keys

Configure shortcut keys in 'SIP Settings > Calling Shortcut Settings' for quick dialing of indoor monitors or personnel.

Direct Calling

In 'Calling Shortcut Settings', select 'Direct Calling Mode' and add indoor monitors to call them directly.

SIP Server

Enable SIP Server on the device. This mode requires ZKBio CVAccess server, ZKBio Zexus Mobile App, or PC Client BioTalk Pro. Supports Cloud SIP or PBX server. For Cloud SIP, activate ZKBio CVConnect Client and bind an account. Add devices and create extension numbers/SIP accounts in ZKBio CVAccess. Assign extension numbers to personnel or system users for app communication. PC clients require SIP account configuration.

17.2.1 SIP Server Configuration

Enable Cloud SIP service in ZKBio CVAccess. Install and activate ZKBio CVConnect Client. Select Area, Local Application (ZKBio CVAccess), and EndPoint. Bind ZKBio CVConnect Account and select/create a Company.

17.2.2 Add Device

Add the device to the Access Module in ZKBio CVAccess. Add indoor monitors in 'Video Intercom > Device Management > Device', configuring IP Address, Port, and Room Number.

17.2.3 Create Extension Numbers

Create extension numbers in 'Video Intercom > Extension Management > Extension Number'. The system automatically generates a SIP account. The number of registered terminals and SIP account details are configured here.

17.2.4 Contact List

Configure contact lists in 'Extension Management > Contact List' to assign short numbers for extension numbers for easier dialing.

17.2.5 Assignment of Extension Numbers and SIP Accounts

Assign extension numbers to 'Device', 'Personnel', or 'System Users'. This allows direct communication via the app or device without manual configuration. Authorized Contacts can be assigned to the device or personnel.

17.2.6 PC Client Functionality

Configure the BioTalk Pro PC client with SIP account details (Username, Display Name, SIP Domain, Password, Transport). The PC client can then make and receive calls from devices, apps, and other PC clients.

17.2.7 Make a Call

Two-way calls can be made between the device, indoor monitor, ZKBio Zexus App, and PC client. Calls can be initiated by entering short numbers or selecting from the contact list.

18 Connecting to ZKBio Zlink Mobile App

Change the device communication protocol to BEST protocol for ZKBio Zlink management. Download the 'ZKBio Zlink' app from app stores. Log in with registered account credentials.

Add Device on the Mobile App

In the app, navigate to '[Device] > + icon > [Add Device] > [Access Control] > [SenseFace 4 Series]'. Scan the device's QR code, search for the device, and add it by specifying a name, site, and zone.

Video Intercom

Access '[Applications] > [Video Intercom]' to call devices or unlock doors remotely. Assign persons to answer calls via '[Add Call Notification]'. Calls can be made by entering the person's number or selecting from the contact list.

19 Connecting to ZKBio Zlink Web Portal

Change the device communication protocol to BEST protocol for ZKBio Zlink management. Access the portal via http://zlink.minervaiot.com. Log in with registered account credentials.

Add Device on the Web Portal

Navigate to '[Device Center] > [Device]'. Click '[Add Device]', enter the Serial Number, click '[Search]', then enter the device name and specify a site. Save to complete the addition. Access level settings can be configured afterward.

Appendix 1

Requirements of Live Collection and Registration of Visible Light Face Templates

Register in well-lit indoor environments, avoiding direct light sources. Use dark apparel. Ensure face and forehead are exposed, hair does not cover eyebrows. Maintain a plain facial expression. Users with glasses should register templates with and without glasses. Avoid scarves or masks. Face the camera, center the face within the capturing area. Do not include multiple faces. Recommended capture distance is 50cm to 80cm.

Requirements for Visible Light Digital Face Template Data

Photos should be straight-edged, colored, half-portrayed, with a neutral face or smile, and eyes open. Eye distance should be 200 pixels or above. Horizontal/elevation/depression angles should not exceed ±10°. Masks or colored eyeglasses are not allowed. Eyeglass frames should not cover eyes or reflect light. Face template should have clear contours, natural scale, even lighting, and no shadow. Supported formats: BMP, JPG, JPEG. Data requirements include white background, dark apparel, 24-bit color, JPG format (max 20kb), resolution between 358x441 to 1080x1920, 2:1 head-to-body ratio, shoulders visible, clear iris, and appropriate contrast/lightness.

Appendix 2

Privacy Policy

ZKTeco collects personal information for product operation and service improvement, including user registration data (biometric templates, name, code) and product information (model, firmware version, serial number). Data is encrypted using AES 256. Users must set administrator privileges and can choose whether to display biometric information or user verification details. The camera function is disabled by default. All collected personal information can be queried, modified, or deleted. Minors' data is handled with parental consent. For more details, visit https://www.zkteco.com/cn/index/Index/privacy_protection.html.

Eco-friendly Operation

The product's eco-friendly operational period refers to the time it will not discharge toxic or hazardous substances. The battery's eco-friendly operational period is 5 years. The table indicates the presence of hazardous substances in components, with '' denoting below limit and '' denoting exceeding limit as per SJ/T 11364 and GB/T 26572 standards. 80% of components are non-toxic.