Adjustable Lock Cylinder: the inside handle can be adjustable freely extended by 10 to 20mm.<br> Fingerprint Unlock: Max support with 100 fingerprints. suitable for both safety doors, doors, wooden doors, glass doors.<br> Support 100,000 times of rotating reliable test to make sure high stable and safe quality.<br> Long Life Battery Caring: One charge can be used: 8-12 months, Charging takes only 2 hours<br> Specifications:<br> 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.<br> Security Level: Highest Level<br> Number of Fingerprints: 21, 1 administrator fingerprint, 20 ordinary user fingerprints<br> Suitable Door Types: Security door, door, wooden door, glass door<br> Adapt to Door Thickness: 60-100mm<br> Lock Cylinder Size: 70mm 90mm<br> APP: Tuya<br> Unlock Mode: Fingerprint, Bluetooth APP<br> Material: 304 stainless steel + aluminum + plastic<br> colour: black<br> Package Contents:<br> 1 x Fingerprint lock<br> 2 x Screw<br> 1 x English manual<br> 1 x Data cable<br> Only the above package content, other products are not included.<br> 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.