WELOCK U81 Smart Lock Cylinder with Fingerprint, PIN & Key PRODUCT MODEL:U81+WIFIBOX3 the battery life is up

the battery life is up to 10 months

Alexa voice control (WIFIBOX3 required)

you can use the USB backup to unlock

Supports up to 10 administrators (including passwords and cards

WELOCK U81 Smart Lock Cylinder with Fingerprint, PIN & Key PRODUCT MODEL:U81+WIFIBOX3 the battery life is up1. 6 Ways to Unlock Unlock with a fingerprint, PIN code, RFID card, Bluetooth, WELOCK app, mechanical key, or Alexa (via WiFiBox3) for flexible keyless access at home, rentals, or the office. 2. Designed for Narrow Euro Profile Doors Fits compatible Euro profile cylinder doors with door backsets from 25 mm, making installation possible where many smart cylinders won't fit. 3. Remote Control & Smart Home Pair with WiFiBox3 for remote unlocking, access