【3 Unlocking Methods】The advanced and convenient smart door handle has 3 unlocking methods: fingerprint unlocking, app control unlocking, emergency spare key, making entry and exit more convenient.【Simple, smart, safe】 The door lock has biometrics and supports App control, which can easily realize fingerprint management. You can view unlock records, automatic locks, traffic modes, and security locks through the App to control your home security.【Classic Design But Stronger】The door handle continues the classic style design, equipped with fingerprint lock function and modern app control, it is a very ideal fingerprint door handle smart lock for bedroom doors, offices, apartments, hotels.【Easy to Install】Fingerprint door handle door lock can be easily installed with a screwdriver in minutes, fits most US doors, easily replaces existing door locks. Provide detailed installation steps and videos.【Note】 The smart door lock is suitable for wooden doors, fire doors, security doors, etc. between 30-55mm. 4 AAA batteries are required for installation（Battery needs to be purchased by oneself）, and the USB interface can also be used for emergency power supply when you are in low power mode, but please be careful not to charge it, and replace the battery again.