Adjustable Lock Cylinder: the inside handle can be adjustable freely extended by 10 to 20mm. Fingerprint Unlock: Max support with 100 . suitable for both safety doors, doors, wooden doors, glass doors. Support 100,000 times of rotating reliable test to make sure high stable and safe quality. Battery Caring: One charge can be used: 8-12 months, Charging takes only 2 hours Specifications: An easy to install, maintain and use smart door lock that requires no drilling, no wiring and no carpentry work. Unlock conveniently via your Tuya APP, fingerprint. Security Level: Highest Level Number of : 21, 1 administrator fingerprint, 20 ordinary user Suitable Door Types: Security door, door, wooden door, glass door Adapt to Door Thickness: 60-100mm Lock Cylinder Size: 70mm 90mm APP: Tuya Unlock Mode: Fingerprint, Bluetooth APP Material: 304 stainless steel and aluminum and plastic colour: black Package Contents: 1 x Fingerprint lock 2 x Screw 1 x English manual 1 x Data cable Only the above package content, other products are not included. Note: Light reflection 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.