1. Product Overview
The NUTOMO Keyless Entry Door Lock with Knob (Model M3) offers advanced security and convenience for your home or office. This smart lock provides multiple access methods, including fingerprint, passcode, APP control, IC cards, mechanical keys, and voice control via Alexa (with gateway). Designed for ease of use and robust performance, it ensures reliable access control and peace of mind.

Image: The NUTOMO Smart Lock installed on a door, with a smartphone displaying the companion app interface.

Image: A visual representation of the lock's versatile features, including APP Control, Keyfobs Unlock, Long Battery Life, Auto-Lock, WiFi Remote Access, 3D Fingerprint, View Actual Door Logs, and One-Touch Lock.
2. Setup and Installation
The NUTOMO M3 lock is designed for straightforward installation on most standard doors. All you need is a screwdriver.
2.1 Door Compatibility
This lock is compatible with doors 1-1/4" to 1-3/4" in thickness and comes with two adjustable metal door latches (2-3/8" or 2-3/4"). It supports both right and left handing doors.

Image: A diagram illustrating the required door measurements and latch compatibility for installation, including backset and door thickness.
2.2 Installation Steps
- Ensure your door meets the compatibility requirements.
- Follow the detailed instructions provided in the included Installation Instruction manual.
- Install the exterior lock, interior deadbolt, latch, and mounting plate using the provided screws.
- Complete the basic digital lock setup by following the voice prompts from the lock.
- Add the lock to the companion APP by going to Settings and choosing the correct door opening direction (Left/Right).
Note: A screwdriver is the only tool required for installation.
3. Operating Instructions
The NUTOMO M3 Smart Lock offers multiple convenient ways to access your property.
3.1 Unlocking Methods
- Fingerprint: Quick recognition in 0.1 seconds with high accuracy.
- Passcode: Set up to 250 unique codes. Utilize the anti-peeping feature by entering random numbers before or after your actual code to prevent unauthorized viewing.
- APP Control: Remotely control and manage your lock via the Next Lock APP.
- IC Cards: Use up to 1000 IC cards for convenient tap-to-unlock access.
- Mechanical Keys: Three physical keys are included for traditional backup access.
- Alexa Voice Control: Unlock using voice commands through Alexa (requires a separate gateway).
- Ekey: Digital keys can be shared for temporary or permanent access.
- Remote Control: (Gateway sold separately)

Image: A detailed view of the smart lock's fingerprint recognition technology, highlighting the sensor.

Image: Individuals interacting with the smart lock using voice commands through an Alexa device, demonstrating the voice control feature.

Image: A person receiving a temporary access passcode via text message, illustrating the remote passcode generation feature.
3.2 Auto-Lock Feature
For enhanced security, the lock can be set to automatically lock after a specified period (5-900 seconds) once the door is closed.

Image: A visual depiction of the auto-lock mechanism, showing the deadbolt extending automatically after a set time.
3.3 Real-time Notifications and Logs
The Next Lock APP allows you to check the lock status and usage history in real-time, providing notifications for unlocks and other activities.

Image: A person viewing real-time notifications on their smartphone, showing a log of lock activities and user access.
4. Maintenance
The NUTOMO M3 lock is powered by 4 AA batteries (not included) that can last up to 6 months. The Next Lock APP will notify you when the battery level is low, and you can monitor the battery status within the app at any time.
- Replace batteries promptly when low battery alerts are received.
- Keep the lock clean by wiping it with a soft, dry cloth. Avoid abrasive cleaners.
- Ensure the door alignment is correct for smooth operation of the deadbolt.
5. Troubleshooting
If you encounter issues with your NUTOMO M3 Smart Lock, please refer to the following common solutions:
| Problem | Possible Cause / Solution |
|---|---|
| Lock not responding / No power | Check battery level in the APP or replace the 4 AA batteries. Ensure batteries are inserted correctly. |
| Fingerprint recognition failure | Ensure your finger is clean and dry. Try re-registering your fingerprint. Ensure the sensor is clean. |
| Keypad not working / Incorrect code lockout | If 5 incorrect passcodes are entered, the keypad will lock for 3 minutes. Wait for the lockout period to end. Ensure you are using the correct passcode. |
| Deadbolt not extending/retracting smoothly | Check door alignment and ensure there is no obstruction. The door frame strike plate might need adjustment. |
| APP connectivity issues | Ensure Bluetooth is enabled on your phone and you are within range. If using Wi-Fi (with gateway), check gateway connection and Wi-Fi signal. Try restarting the APP. |
| Lock needs to be reset | Refer to the "Reset" instructions in the full user manual or contact support. |
For further assistance, please contact NUTOMO customer support.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | NUTOMO |
| Model Name | M3-BBFKN-NUT (M3) |
| Lock Type | APP Lock, Biometric, Keyfobs & Key Lock, Keypad |
| Material | Aluminum |
| Color | Black |
| Item Dimensions (L x W x H) | 6.38 x 5.43 x 12.8 inches |
| Item Weight | 3.37 pounds |
| Power Source | 4 AA Batteries (not included) |
| Connectivity Protocol | Bluetooth, Wi-Fi (with optional gateway) |
| Controller Type | Amazon Alexa, Android, Google Assistant, iOS |
| Included Components | Exterior lock, Interior deadbolt, Latch, Mounting Plate, Installation Instruction, Screws, 2 IC Cards, 3 Keys |
7. Warranty and Support
NUTOMO is committed to providing reliable products and excellent customer service.
- Money Back Guarantee: 30-Day money back policy.
- Warranty: 1-year warranty from the date of purchase.
- Technical Support: Lifetime technical support is available.
For technical assistance or warranty claims, please contact NUTOMO customer support:
Phone: +1(888)666-2755
Please have your product model and purchase information ready when contacting support.




