1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Evanshow Fingerprint Door Lock, Model 190NOSilver. Please read this manual thoroughly before installation and use to ensure proper function and security. This smart lock offers multiple convenient access methods, enhancing security for various indoor applications.
2. Product Features
- 4-in-1 Smart Lock: Offers multiple access options including fingerprint, password, IC card, and mechanical keys.
- High Capacity: Supports up to 100 unique fingerprints and 100 user-defined passwords.
- Advanced Fingerprint Sensor: Features an upgraded sensor with 0.5-second recognition speed and 360° recognition for quick and accurate access.
- Easy Installation: Designed for straightforward installation on wooden doors 1.18"-1.97" thick, without requiring complex drilling or wiring.
- Enhanced Security: Utilizes advanced biometric technology to prevent unauthorized access, ensuring home security.
- Auto-Lock Function: Customizable auto-lock feature for added convenience and peace of mind.
- Anti-Peep Password: Allows users to enter random digits before or after the actual password to prevent onlookers from guessing the code.
3. Package Contents
Verify that all components are present before beginning installation:

Figure 3.1: All components included in the Evanshow Fingerprint Door Lock package.
- Exterior Handle with Keypad and Fingerprint Sensor (1)
- Interior Handle (1)
- Latch Mechanism (1)
- Strike Plate (1)
- Screws and Installation Hardware (various)
- Small Screwdriver (1)
- IC Cards (4)
- Mechanical Keys (2)
- USB-C Charging Cable (1)
- AAA Batteries (4)
- Instruction Manual (this document)
4. Installation Guide
The Evanshow Fingerprint Door Lock is designed for easy installation. A video tutorial is available to guide you through the process.
Video 4.1: Official installation guide for the Evanshow Fingerprint Door Lock.
4.1 Pre-Installation Checks
- Ensure your door thickness is between 1.18 inches (30mm) and 1.97 inches (50mm).
- Confirm the door bore hole diameter is suitable for standard door locks.
- Determine the hand orientation (left or right swing) of your door. The lock is reversible.

Figure 4.2: Door dimension requirements for installation.
4.2 Step-by-Step Installation
- Install the Latch: Insert the latch mechanism into the edge of the door and secure it with screws. Ensure the latch bolt faces the correct direction for your door swing.
- Install the Strike Plate: Attach the strike plate to the door frame, aligning it with the latch mechanism.
- Prepare Handles: Connect the wires from the exterior handle to the interior handle.
- Mount Handles: Insert the exterior handle through the door, ensuring the spindle aligns with the latch. Then, attach the interior handle, securing both sides with the provided screws.
- Install Batteries: Open the battery compartment on the interior handle and insert 4 AAA batteries, ensuring correct polarity.
- Test Functionality: After installation, test all unlocking methods (fingerprint, password, IC card, mechanical key) to ensure proper operation.
5. Operating Instructions
Your Evanshow Fingerprint Door Lock offers multiple ways to secure and access your space.

Figure 5.1: Overview of the 4-in-1 smart lock access options.
5.1 Unlocking Methods
- Fingerprint Unlock: Place your registered finger on the fingerprint sensor. The lock will unlock in approximately 0.5 seconds upon successful recognition.
- Password Unlock: Enter your registered passcode on the keypad. The keypad illuminates when activated.
- IC Card Unlock: Tap a registered IC card against the designated area on the exterior handle.
- Mechanical Key Unlock: In case of emergency or battery depletion, use the provided mechanical keys to unlock the door. The keyhole is located at the bottom of the exterior handle.

Figure 5.2: Fingerprint unlocking in action.

Figure 5.3: Using the keypad for password entry.

Figure 5.4: Unlocking the door with an IC card.

Figure 5.5: Using a mechanical key for emergency access.
5.2 Auto-Lock Feature
The lock can be configured to automatically lock after a set period. This feature can be customized or disabled as needed.

Figure 5.6: Auto-lock functionality for enhanced security.
5.3 Anti-Peep Password
To prevent others from observing your password, you can enter random digits before or after your actual password. The lock will still recognize the correct sequence within the longer input.

Figure 5.7: Using the anti-peep password feature.
5.4 Adding/Deleting Users
Refer to the detailed instructions in the included instruction manual for specific steps on how to enroll new fingerprints, set up new passcodes, and register or remove IC cards. This process typically involves accessing the lock's programming mode.
6. Maintenance
6.1 Battery Replacement
The lock requires 4 AAA batteries. When the battery level is low, the lock will provide an audible or visual warning. Replace all four batteries simultaneously to ensure optimal performance.

Figure 6.1: Location of the battery compartment on the interior handle.
6.2 Cleaning
Wipe the lock's surface with a soft, dry cloth. Avoid using abrasive cleaners or solvents that could damage the finish or electronic components.
7. Troubleshooting
- Lock not responding: Check battery levels and replace if necessary. Ensure the wires are securely connected.
- Fingerprint not recognized: Ensure your finger is clean and dry. Re-enroll your fingerprint if issues persist.
- Passcode not working: Verify the correct passcode is being entered. Try resetting the passcode.
- Auto-lock not engaging: Check the auto-lock settings and ensure it is enabled with the desired delay.
- Mechanical key not working: Ensure the key is fully inserted and turned correctly.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | 190NOSilver |
| Material | Metal |
| Product Dimensions | 1"L x 2"W |
| Item Weight | 1.2 Pounds |
| Lock Type | Privacy |
| Handle Material | Metal |
| Hand Orientation | Reversible |
| Special Feature | Fingerprint |
| Batteries Required | 4 AAA Batteries |
| Color | Black |
9. Warranty and Support
For warranty information and technical support, please refer to the contact details provided on the product packaging or the official Evanshow website. Keep your purchase receipt as proof of purchase for warranty claims.