[Fingerprint one-key unlock]: The adopts advanced biometric fingerprint recognition technology with a resolution of 508DPI and a fingerprint recognition rate of 98%. It only takes 1 second to open the door. You can add 20 sets of to eliminate the trouble of forgetting to carry your keys when you go out. [Three unlocking modes]: The fingerprint door lock supports three unlocking modes: fingerprint, password and mechanical key. You can set the free pass mode according to your needs and keep it unlocked at any time, which is convenient for children and the elderly to import and export freely. [DIY installation]: The keyless entry door lock design is suitable for doors, back panels, 2-3/8 inches (60 mm) and 2-1/8 inches (70 mm), the thickness of the door is from 1-3/8 inches (35mm-55mm). No wiring or drilling is required. Suitable for left-handed and right-handed doors (suitable for indoor and outdoor doors). [Reminder]: The smart door lock requires 4 AAA batteries (not included in the scope of supply). Depending on the frequency of use, it can be used for up to 8-10 months. Equipped with a low battery reminder function (the red light will flash three times when unlocked, accompanied by buzzing, buzzing, and beeping); equipped with a USB interface for emergency charging. colour:Black Material:Zinc alloy Package Contents: 1 x Door lock 1 set x installation accessories Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.