Smart Adjustable Cylinder Lock, Multiple ways to Unlock- Digital Keypad, Unlock via Bluetooth through ENERJSMART APP, Fingerprints, Generate Codes remotely & Give it to your visitors (Colour Silver) Adjustable Lock Cylinder: Will fit on any door with a thickness of 35-70mm with an industry-standard deadbolt borehole that is 2-1/8" in diameter. Each lock comes with rubber spacers to help create the most secure fit. 4 Ways to use: Fingerprint, Keypad, App via Bluetooth or mechanical keys. Remote Monitoring: Can monitor on the app remotely, which user used the door and when. Also generate codes remotely and give them to your visitors. Sleek Design and Easy Installation: Nice Silver colour body with 304 Stainless Steel + Aluminum + Plastic material. IP55 rated so dont need to worry about weather. Ideal for AirBnB hosts, HMO's, block of flats, offices, shops and for every home Battery Type: AAA Battery (Not included) Waterproof Grade: IP55 rated