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 hoursSpecifications: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 LevelNumber of : 21, 1 administrator fingerprint, 20 ordinary user Suitable Door Types: Security door, door, wooden door, glass doorAdapt to Door Thickness: 60-100mmLock Cylinder Size: 70mm 90mm APP: TuyaUnlock Mode: Fingerprint, Bluetooth APPMaterial: 304 stainless steel + aluminum + plasticcolour: blackPackage Contents:1 x Fingerprint lock 2 x Screw 1 x English manual 1 x Data cableOnly 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.