Tuya WiFi Fingerprint Door Lock Material: Durable zinc alloy construction. User capacity: 1 master code + up to 100 fingerprint users. Fast fingerprint scanning: Recognition time of ≤0.1 seconds. 360° fingerprint recognition: Supports users from young to elderly; each user only needs to register their fingerprint once for long-term use. Anti-peeping password: Phantom password technology allows users to enter extra numbers before or after the actual password to prevent others from observing the code. Multiple unlocking methods: Fingerprint, anti-peeping password, fingerprint + password, mechanical key, and IC card. Smart connectivity: Tuya WiFi smart lock system.