1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Splenssy Smart Door Lock. This smart lock offers multiple entry methods including fingerprint, passcode, RFID card, mechanical key, and mobile application (APP) access. It is designed for doors with a thickness between 35mm and 55mm.
Please read this manual thoroughly before installation and use to ensure proper function and security.
2. Product Overview
2.1 Key Features
- Multiple Unlocking Methods: Fingerprint, Passcode, RFID Card, Mechanical Key, and APP.
- High Capacity: Stores up to 100 fingerprints, 100 passcodes, and 100 RFID cards.
- App Integration: Manage users, view unlock records, and control the lock remotely via Wi-Fi (requires gateway).
- Voice Navigation: Real-time voice prompts for operation.
- Durable Construction: Die-cast aluminum alloy shell with waterproof keypad.
- Emergency Power: USB Type-C port for external power in case of battery depletion.
- Low Voltage Alarm: Alerts when batteries are low (≤4.8V).
2.2 Package Contents
Verify that all components listed below are included in your package:
- 1 x Front Lock Panel
- 1 x Rear Lock Panel
- 1 x Lock Body
- 2 x Mechanical Keys
- 2 x IC Cards (RFID Cards)
- 1 x Install Screw Kit
- 1 x Opening Hole Template Diagram
- 1 x Instruction Manual (this document)

Image: Overview of the Splenssy Smart Door Lock components and installation diagram.

Image: All components of the Splenssy Smart Door Lock laid out, including panels, lock body, keys, cards, and screws.
3. Setup
3.1 Door Preparation and Installation
Ensure your door thickness is between 35mm and 55mm. Use the provided Opening Hole Template Diagram to prepare your door for installation. Follow the steps below for mechanical installation:
- Install the lock body into the door edge.
- Attach the front lock panel, ensuring the spindle and wires pass through the door.
- Connect the wires from the front panel to the rear panel.
- Secure the rear lock panel to the door using the provided screw kit.
- Test the mechanical operation of the handle and deadbolt.

Image: Detailed diagram illustrating the step-by-step installation process of the smart door lock components.
3.2 Battery Installation
The lock requires 4 AA batteries (not included). Install them into the battery compartment on the rear panel. Ensure correct polarity. The lock will provide a voice prompt upon successful power-up.
3.3 App Setup and Wi-Fi Connection
To utilize the Wi-Fi features and remote control, download the accompanying mobile application. Follow the in-app instructions to pair your lock. A gateway device is required for remote monitoring, changing/deleting passwords remotely, and other advanced Wi-Fi functions. Basic app functions can be performed near the lock without a gateway.

Image: Diagram showing the smart lock's connectivity with a mobile phone, access control box, and router for internet status and remote control.
4. Operating Instructions
4.1 Unlocking Methods
Your Splenssy Smart Door Lock supports five methods for unlocking:
- Fingerprint Unlock: Place your registered finger on the fingerprint sensor.
- Passcode Unlock: Enter your registered passcode on the touchscreen keypad.
- RFID Card Unlock: Present your registered RFID card to the card reader area.
- Key Unlock: Use one of the provided mechanical keys in the emergency keyhole.
- APP Unlock: Use the mobile application to unlock the door (requires Wi-Fi connection and gateway for remote unlock).

Image: Visual representation of the five unlocking methods: Passcode, Fingerprint, APP, Key, and Card Unlock.

Image: Detailed illustrations of fingerprint, mobile app, passcode, access card, and key unlocking methods.
4.2 User Management (via APP)
The mobile application allows you to add, modify, or delete users for fingerprint, passcode, and RFID card access. Refer to the app's specific instructions for detailed steps on user management.
4.3 Continuous Open Mode
The indoor button can activate a continuous open mode with a short press. Press it again to cancel this mode. This feature is useful for temporary unrestricted access.
4.4 Emergency Unlock
In case of battery failure, you can use the mechanical key to unlock the door. Additionally, an external USB Type-C power bank can be connected to the emergency power interface on the front panel to temporarily power the lock and allow entry via electronic methods.

Image: Illustrations showing the Micro USB emergency power supply port and the mechanical key port for emergency unlocking.
5. Maintenance
- Cleaning: Wipe the lock surface with a soft, dry cloth. Avoid abrasive cleaners or solvents.
- Battery Replacement: Replace all 4 AA batteries when the low voltage alarm activates. Do not mix old and new batteries.
- Keypad Protection: Although waterproof, avoid prolonged exposure to direct sunlight or heavy rain to prolong lifespan.
- Mechanical Key Storage: Store mechanical keys in a safe, accessible location outside the property for emergency use.
6. Troubleshooting
If you encounter issues with your smart lock, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Lock does not respond or power on. | Dead batteries, incorrect battery installation. | Replace batteries with new ones, ensuring correct polarity. Use USB emergency power if needed. |
| Fingerprint not recognized. | Fingerprint not registered, dirty sensor, wet finger. | Ensure fingerprint is registered. Clean the sensor. Ensure finger is dry and placed correctly. Try re-registering the fingerprint. |
| Passcode not working. | Incorrect passcode, passcode not registered. | Verify the passcode. Ensure it is registered. Try resetting the passcode via the app. |
| RFID card not unlocking. | Card not registered, card damaged. | Ensure the RFID card is registered. Try a different registered card. |
| App cannot connect to the lock. | No Wi-Fi gateway, poor Wi-Fi signal, app not paired. | Ensure a Wi-Fi gateway is installed and configured. Check Wi-Fi signal strength. Re-pair the lock with the app. |
| Lock is difficult to program. | Instructions unclear, user error. | Review the app's instructions and this manual carefully. Ensure each step is followed precisely. Contact customer support if issues persist. |
| Lockout occurs frequently. | Unreliable electronic methods, low battery. | Ensure batteries are fresh. Always have a mechanical key accessible. Re-register frequently used fingerprints/passcodes. |
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | SGZ1251115139252KY |
| Unlock Types | APP, Fingerprint, Password, IC Card, Key |
| Storage Capacity | 100 Fingerprints, 100 Passwords, 100 IC Cards |
| Power Supply | 4 * AA Batteries (not included) |
| Low Voltage Alarm | ≤4.8V |
| Emergency Power | USB Type-C DC 5V/1A |
| Shell Material | Die-cast Aluminum Alloy |
| Applicable Door Thickness | 35mm-55mm |
| Operating Environment | -25℃ to +70℃ |
| Working Humidity | 0%-95% |
| Front Panel Size | 6.8 x 2 x 16.3 cm (2.7 x 0.8 x 6.4 inches) |
| Rear Panel Size | 7.7 x 3 x 17.4 cm (3 x 1.2 x 6.9 inches) |
| Connectivity | Wi-Fi |

Image: Dimensions of the Splenssy Smart Door Lock front and rear panels.
8. Warranty and Support
For warranty information and technical support, please refer to the warranty card included in your package or contact Splenssy customer service directly. Keep your purchase receipt for warranty claims.