1. Introduction
Thank you for choosing the Harfo Fingerprint Smart Door Lock. This manual provides detailed instructions for the installation, setup, operation, and maintenance of your new smart lock. This keyless entry system offers multiple access methods including fingerprint, passcode, IC card, and smartphone app control, enhancing the security and convenience of your home.
2. Safety Information
- Do not attempt to disassemble or repair the lock yourself. Refer to qualified personnel for service.
- Use only the specified battery type and ensure correct polarity during installation.
- Avoid exposing the lock to direct sunlight, rain, or extreme temperatures.
- Keep all components, especially small parts, out of reach of children.
- Regularly check the lock for any signs of damage or malfunction.
3. Package Contents
Before beginning installation, please verify that all components are present and in good condition:
- High Quality Handleset
- Necessary Hardware for Installation (screws, bolts, etc.)
- Detailed Installation Instructions (this manual)
- 3 IC Cards
- 2 Physical Keys
4. Installation Guide
The Harfo Smart Door Lock is designed for easy installation and is suitable for most American standard left and right-handed doors. No wiring is needed.
4.1 Door Compatibility
- Door Thickness Range: 1 3/8 inch to 2 3/16 inch (35mm-55mm) thick.
- Backset: 2-3/8 inch or 2-3/4 inch (60mm or 70mm).
- Borehole Diameter: 2-1/8 inch (54mm).

4.2 Installation Steps
Follow the detailed instructions provided in the included installation guide. A typical installation can be completed in minutes with basic tools.

5. Setup and Configuration
The Harfo Smart Door Lock offers advanced app control for comprehensive management.
5.1 App Download and Pairing
Download the dedicated smartphone app (e.g., TTLock app, as implied by product images) from your device's app store. Follow the in-app instructions to pair your smart lock via Bluetooth.

5.2 User Management
The app allows you to add and remove users, manage access permissions, and view user logs.
- Fingerprints: Store up to 50 unique fingerprints.
- Passcodes: Create up to 250 unique passcodes.
- IC Cards: Register up to 1000 IC cards (3 included).
- eKey Sharing: Share temporary or permanent eKeys with authorized users.


6. Operating Instructions
Your Harfo Smart Door Lock provides multiple convenient ways to access your property.
6.1 Unlocking Methods
- Fingerprint: Place your registered finger on the fingerprint sensor.
- Passcode: Enter your registered passcode on the touchscreen keypad.
- IC Card: Tap a registered IC card on the designated area of the lock.
- Physical Key: Use the provided physical keys as a traditional backup.
- App Control: Unlock directly from the smartphone app via Bluetooth.
- eKey: Use an eKey shared with you through the app.

6.2 Locking Methods
- Auto Lock: Set the auto-lock feature via the app for a duration between 5 and 900 seconds. The lock will automatically engage after the set time.
- One-Touch Lock: Simply press and hold the "#" button on the keypad for 2 seconds to manually lock the door.

6.3 Advanced Features
- Anti-Peeping Password: Enter random digits before or after your actual passcode to prevent others from guessing your code.
- Privacy Mode: Engage privacy mode from the inside to prevent external access.
- Passage Mode: Keep the door unlocked for continuous access during specific periods.
- Silent Mode: Disable keypad sounds for quiet operation.
- Emergency Power Port: A micro USB port is available for temporary power supply using a power bank in case of battery depletion.


7. Smart Home Integration
Enhance your smart home experience by integrating your Harfo Smart Door Lock with voice assistants and remote access capabilities.
Note: Remote access and voice control features require the Harfo gateway (sold separately).
- Voice Control: Lock/unlock your door using voice commands with Amazon Alexa or Google Assistant.
- Remote Access: Unlock your keyless entry door lock from anywhere, anytime.
- Real-time Notifications: Receive push notifications on your smartphone for lock status changes.
- Monitor Status: Check the current status of your smart door lock remotely.


8. Maintenance
Proper maintenance ensures the longevity and optimal performance of your Harfo Smart Door Lock.
- Battery Replacement: The lock requires batteries (not included). Replace all batteries simultaneously when the low battery indicator appears or performance degrades. Use high-quality alkaline batteries.
- Cleaning: Wipe the lock's exterior with a soft, dry cloth. Avoid abrasive cleaners or solvents that could damage the finish or electronic components.
- Lubrication: Periodically lubricate the mechanical parts of the deadbolt and handle with a silicone-based lubricant to ensure smooth operation.
9. Troubleshooting
If you encounter issues with your Harfo Smart Door Lock, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Lock does not respond to input. | Dead batteries. | Replace batteries. Use the emergency micro USB port for temporary power if needed. |
| Fingerprint not recognized. | Finger is wet/dirty, sensor is dirty, or fingerprint not properly registered. | Ensure finger and sensor are clean and dry. Re-register fingerprint if necessary. Try different angle. |
| Keypad unresponsive. | Keypad is in sleep mode or batteries are low. | Touch the keypad to wake it up. Replace batteries if issue persists. |
| Auto-lock not working. | Auto-lock feature is disabled or set to a long delay. | Check auto-lock settings in the app and adjust the delay time. Ensure the door is fully closed. |
| Cannot connect to app. | Bluetooth is off, lock is out of range, or app issue. | Ensure Bluetooth is enabled on your phone. Move closer to the lock. Restart the app or phone. |
10. Specifications
Detailed technical specifications for the Harfo Fingerprint Smart Door Lock (Model DA2K-BK):
| Feature | Specification |
|---|---|
| Brand | HARFO |
| Model Name | DA2 |
| Part Number | DA2K-BK |
| Lock Type | Biometric, Combination Lock, Deadbolt, Keypad |
| Special Features | Anti-Drill, Anti-Peeping Password, Auto-Lock, Fingerprint, Fob Unlock |
| Material | Zinc |
| Color | Black |
| Finish Type | Polished |
| Item Dimensions (L x W x H) | 8 x 3 x 13 inches |
| Item Weight | 3.43 pounds (1.56 Kilograms) |
| Connectivity Protocol | Bluetooth |
| Control Method | App, Remote (with gateway), Touch, Voice (with gateway) |
| Controller Type | Amazon Alexa, Google Assistant (with gateway) |
| Batteries Required? | Yes |
| Batteries Included? | No |
| Door Thickness Range | 1 3/8 inch to 2 3/16 inch (35mm-55mm) |
11. Warranty and Support
HARFO is committed to providing high-quality products and customer satisfaction.
- Warranty Information: For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official HARFO website.
- Customer Support: If you have any questions, require technical assistance, or need to report an issue, please contact HARFO customer support through the contact information provided on the official HARFO website or through your purchase platform.




