Features: 3 WAYS TO UNLOCK  Advanced 3-in-1 Keyless Biometric door lock: Tuya App + Fingerprint + Physical Key, fingerprint recognition rate up to 98percent and open the door just need 1 second. You can add 20 groups fingerprints Eliminate the trouble of forgetting to bring the key when you go out. DIY INSTALLATION  Fingerprint door lock is designed to fit US standard door, Backset 2-38"(60mm)and 2-18"(70mm) , door thicknesses from 1-38'' to 2-18''(35mm -55mm). No drilling. Fit both left-handed and right-handed doors. Boarding & HOMEOWNER Fingerprint door lock providing your room with an added level of safety, it is simplistic design for office, apartment or other private spaces. EMERGENCY CHARGING Keypad door knob requires 4 AAA batteries (not included), According to the frequency of use, it can be used for up to 6 months. It has low battery reminder function, equipped with a USB interface for emergency charging. Highly Security Real-time access notification and Access Log let you know who comes and goes from anywhere using the Tuya SmartSMART LIFE App. Specification: Model: F3-1500 Color: Black Material: Aluminum Alloy Power Supply: 6v4 AAA Batteries (not included) Unlock Methods: App, Fingerprint, Key Fingerprint Senor: FPC Semiconductor Emergency Supply: Type-C Port Fingerprint Capacity: 20pcs Unlock Speed: less than 0.5s Network: BT Working Humidity: 0-90percent RH  Working Temperature: -20C~+70C Application: Tuya Smart, Smart Life app Package Size: 22.5x20x9cm 8.8 x 7.8 x 3.5in Package Weight: 900g31.7oz Packing List: 1 x Front Handle  1 x Rear Handle  1 x User Manual 1 x Screws Bag (Thickness of Door is 35-55mm.) 1 x Latch (60mm)