Four-in-One Smart Lock: -Keyless access to the door lock, one-step unlocking: fingerprint recognition, password unlocking, phone unlocking. Suitable for 99% of bedrooms, offices and wooden doors. Automaven App Control:-You can use mobile phone to unlock, or you can set a temporary password and share it with friends, visitors or housekeepers. This smart door lock is very suitable for families, hotels, schools and garages. Support ios and android devices. Energy- saving Long Standby-4 AAA batteries (Not included) can provide 8000 unlocks. Equipped with an emergency charging port, in case the battery runs out, don’t worry about being locked out. Tip: The USB port cannot be used to power the door lock or charge the internal battery. Easy to Install-No need to wire, no need to drill, you can easily replace the keyless door and window into the existing knob. Compatible with indoor doors (applicable to left and right doors) the thickness of the door is 35mm-55mm.