1. Introduction
The Xiaomi Smart Door Lock M40 Pro is an advanced security solution designed to provide comprehensive protection and convenient access to your home. Featuring multiple biometric unlocking methods, an AI dual-lens camera, a 5-inch visual screen, and smart home integration, this lock offers a blend of high security and intelligent functionality. This manual provides detailed instructions for installation, operation, maintenance, and troubleshooting to ensure optimal performance and user experience.
2. Package Contents
Please check the package contents carefully. If any items are missing or damaged, contact customer support.
- Smart Door Lock (Front and Rear Panels)
- Lock Mortise
- Rechargeable Lithium Battery (8000mAh)
- Emergency Mechanical Keys
- NFC Card (for 'M40 PRO with card' variant)
- Installation Accessories (screws, mounting plates, etc.)
- User Manual (this document)
3. Specifications
| Feature | Specification |
|---|---|
| Model Number | XMZNMS18OD |
| Product Dimensions (Front Panel) | 431 x 98 x 46 mm |
| Product Dimensions (Rear Panel) | 421 x 98 x 46 mm |
| Net Weight | 5.18 kg |
| Material | Aluminium alloy |
| Power Supply | Built-in 8000mAh Rechargeable Lithium Battery |
| Emergency Power Supply | Type-C (5V=0.5A), 4x No. 5 Alkaline Dry Batteries (1.5V) |
| Product Safety Level | Class B (GA 374-2019) |
| Lock Core Safety Level | C level |
| Wireless Connection | Bluetooth V5.3, NFC, Wi-Fi IEEE 802.11b/g/n/ax 2.4GHz |
| Operating Temperature | -10°C ~ 55°C |
| Working Humidity | 0 ~ 93% RH, no condensation |
| Suitable for Mortise | 6068 |
| Installation Method | Drilling installation |
| Fit Door Thickness | 40-120MM |
| Suitable Door Type | Wooden Door |
| Handle Direction | Direction Reversible |
| Doorknob Function | Biometric |
| Special Features | Built-in Doorbell, Built-in Camera, Built-in Peephole, Built-in Screen, Two-way Audio, Support Gateway |
| Smart Home Platform | Mi Home |
4. Setup
4.1 Important Notices
- This smart door lock operates with the Mi Home APP.
- When connecting, ensure the region of your Mi Home APP is set to "Chinese mainland".
- Remote unlocking requires a video call. The owner must confirm the visitor's identity via the Mi Home APP before remotely unlocking.
4.2 Installation
The Xiaomi Smart Door Lock M40 Pro requires drilling installation. It is suitable for wooden doors with a thickness between 40-120MM and uses a 6068 mortise. The handle direction is reversible to accommodate various door configurations. Professional installation is recommended to ensure proper functionality and security.
4.3 Initial Power and Charging
The lock is powered by a built-in 8000mAh rechargeable lithium battery. For initial use, ensure the battery is charged. The lock also supports emergency power supply via a Type-C port (5V=0.5A) or by inserting 4 No. 5 alkaline dry batteries (1.5V).
4.4 App Connection
Download the Mi Home APP from your device's app store. Follow the in-app instructions to add your Xiaomi Smart Door Lock M40 Pro. The lock supports Bluetooth V5.3 and Wi-Fi IEEE 802.11b/g/n/ax 2.4GHz for seamless connection and remote management.
5. Operating Instructions
5.1 Unlocking Methods
The M40 Pro offers 12 ways to unlock, providing flexibility and convenience for all users:
- AI Palmar Vein Recognition: Uses near-infrared light to scan palm veins for secure and quick unlocking.
- AI 3D Structured Light Face Recognition: Advanced biometric technology for accurate and anti-spoofing face unlocking.
- Fingerprint: Integrated fingerprint sensor for fast and reliable access.
- Password: Supports long-term, cycle, and one-time passwords.
- NFC: Unlock using NFC cards, compatible Xiaomi phones, bracelets, or watches.
- Mobile Phone Bluetooth: Unlock directly via Bluetooth from your paired mobile device.
- Emergency Mechanical Keys: Traditional key access for backup.
- Remote Unlock: Via the Mi Home APP during a video call after identity verification.
5.2 Visual Screen and Intercom
The integrated 5-inch high-definition visual screen provides a clear view of who is at your door. When a visitor presses the doorbell, the screen automatically lights up. You can engage in WeChat audio and video intercom through the Mi Home APP, and even use a voice changer function for added privacy.
5.3 Security Features
- AI Dual-Lens Camera: Provides a panoramic view of the entrance, with a 3-million-pixel main camera (175° wide angle) and a 2-million-pixel auxiliary camera (128° wide angle).
- Dynamic Night Vision: Equipped with 6 night vision fill lights, offering both low-light full-color and infrared night vision modes.
- AI Recognition: Detects people staying, package changes, humanoid recognition, and children going out.
- Mi-Wave Radar: All-weather detection to prevent false positives.
- Noise-Reducing Automatic Lock Body: Features a damper on the flip tongue and full lock tongue monitoring for quiet and secure operation.
5.4 Smart Home Integration and Alarms
The M40 Pro supports Xiaomi Yingya Zhilian and integrates with the Mijia APP, allowing for customized linkage scenes such as automatic lights upon unlocking and voice broadcasts. The lock also provides multiple safety alarms and reminders:
- Door not closed reminder
- Outer panel pinched alarm
- Multiple trial and error reminders
- Long stay in front of the door alert
- Indoor high temperature alarm
- Low battery alarm
6. Maintenance
6.1 Battery Management
The main 8000mAh rechargeable lithium battery provides approximately 4.5 months of battery life. Recharge it using the indoor Type-C port. For emergency power, ensure you have 4 No. 5 alkaline dry batteries (1.5V) installed in the designated compartment. These provide approximately 6 months of dry battery life.
6.2 Cleaning
To maintain the appearance and functionality of your smart door lock, wipe the exterior surfaces with a soft, damp cloth. Avoid using abrasive cleaners or solvents that could damage the finish or electronic components. Ensure the camera lens and visual screen are clean for optimal performance.
7. Troubleshooting
7.1 App Connection Issues
- Cannot connect to Mi Home APP: Ensure your phone's Bluetooth is on and the lock is within range. Verify that your Mi Home APP region is set to "Chinese mainland". Restart both the lock (if possible) and the app.
- Wi-Fi connectivity problems: Check your home Wi-Fi network. Ensure the lock is within Wi-Fi range and the signal is strong.
7.2 Unlocking Failures
- Biometric (Face/Palm/Fingerprint) not recognized: Ensure your hands/face are clean and positioned correctly. For palm vein, ensure your hand is within the recognition distance (9-20 cm). For face recognition, ensure you are within 0.4-0.8 meters.
- Password not working: Double-check the entered password. Ensure the lock is not in an alarm state that might temporarily disable password entry.
- NFC not working: Ensure the NFC card/device is correctly placed over the NFC sensing area.
- Lock unresponsive: Check the battery level. If low, charge the main battery or use the emergency dry batteries. If completely unresponsive, use the emergency mechanical key.
7.3 Alarm Triggers
- "Door not closed" alarm: Ensure the door is fully closed and the lock tongue is engaged.
- "Low battery" alarm: Recharge the main battery promptly or replace the emergency dry batteries.
- Other alarms: Refer to the Mi Home APP for specific alarm details and recommended actions.
8. User Tips
- Regular Battery Checks: Periodically check the battery status via the Mi Home APP to avoid unexpected power loss.
- Emergency Key Access: Always keep your emergency mechanical keys in a secure, accessible location outside your home.
- Familiarize All Users: Ensure all authorized users are familiar with the various unlocking methods and the Mi Home APP functionalities.
- Utilize Smart Features: Explore the Mi Home APP to set up smart linkage scenes and customize security alerts for enhanced convenience and safety.
- Clean Sensors: Keep the camera lenses, fingerprint sensor, and visual screen clean for optimal performance of biometric recognition and visual functions.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official Xiaomi website or contact Xiaomi customer service directly. Keep your proof of purchase for any warranty claims.
