Access options Unlock in 0.25 seconds with a fingerprint scan. Control via Tuya app over Bluetooth. Use mechanical keys. Voice control compatible with Alexa and Google Assistant. Universal design Reversible handle fits left- or right-handed doors. Adjustable latch from 60 to 70 mm to suit door depth. Build and specs Model K1. Semiconductor fingerprint sensor supporting up to 20 fingerprints. Polished aluminum alloy housing. Requires 4 AAA batteries (not included). Door compatibility Works with steel, wood, and stainless steel doors. Suitable for door thicknesses of 35 to 55 mm. Use cases Home entry: quick access for adults and older children, with multiple authorized fingerprints and app access as backup. Small office or coworking space: grant staff and trusted guests access via the app and voice control. Rental properties or shared housing: provide tenants with convenient, secure entry without sharing keys.