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Product description
1 Fingerprint Unlock
2 Physical Keypad
3 Key Unlock
1 App Remote Control
2 Voice Control
3 Doorbell
When the video smart lock MD121 runs out of power, how do you unlock it?
When the battery level drops below 10%, you will receive a low-battery notification. If the battery is completely drained, you can power it up via the port on the exterior lock. You can also unlock the device with the physical key in case of no power
How can I verify if my video smart lock MD121 is installed correctly?
The smart lock is properly installed if the following conditions are met:
The latch works smoothly and the lock feels secure.
Biometric functions (fingerprint, password) operate normally.
The Wi-Fi for remote control and camera viewing is stable.
Why can’t my app connect to the smart lock MD121?
Check the following:
Battery level: Ensure it is ≥80%.
Wi-Fi: Connect to a 2.4GHz network.
Bluetooth: Enable Bluetooth and grant app permissions.
Try a factory reset (follow the instructions in the manual).
🔸【PIR + Radar Dual-Sensor Active Guard】Unlike standard locks that react only when the doorbell is pressed, the built-in PIR infrared sensor and millimeter-wave radar detect motion up to 6ft away, automatically recording and pushing alerts before a stranger even reaches your door.
🔸【6 Keyless Entry Methods】Unlock via biometric fingerprint, PIN keypad (anti-peep mode), IC card fob, Tuya App remote, Alexa voice command, or backup mechanical key. Create temporary one-time codes for cleaners, dog walkers, or Airbnb guests — revoke access instantly from your phone.
🔸【Built-in WiFi 】No Hub, No Gateway, No Monthly Fee — Connects directly to your 2.4GHz WiFi in minutes. Use the Tuya Smart App to remotely unlock, generate time-limited guest codes, view live HD video, and check full access logs — anytime, anywhere. Works with Alexa for voice control.
🔸【365-Day Rechargeable Battery】No extra buy batteries, built-in 37wh large rechargeable Lithium battery, the smart door lock provides 365 days of ultra-long standby, energy-saving, environmentally friendly and trustworthy.
🔸【Easy DIY Installation】Fits standard US deadbolt cutouts (backset 2-3/8″ or 2-3/4″) with no drilling or wiring. IP65-rated for rain, snow, and extreme temperatures (-4°F to 140°F). Backed by a 24-month replacement warranty and dedicated support.
$149.99