[ TO UNLOCK]: Advanced 3-in-1 Keyless Entry Smart Door Lock: Fingerprint + Anti-peep virtual password + Key, fingerprint recognition rate up to 98% and open the door just need 1 second. You can 50 groups , Eliminate the of forgetting to bring the key when you go out.[DIY INSTALLATION]: Keyless Entry Door Lock is designed to fit US standard door, Backset 2-3/8 inch(60mm) and 2-1/8 inch(70mm), door thicknesses from 1-3/8 inch to 2-1/8 inch(35mm -55mm). No wiring and no drilling. Fit both left handed and right handed doors.[Boarding & HOMEOWNER]Fingerprint door lock providing your room with an added level of safety, it is simplistic design for office, apartment or other private spaces.[EMERGENCY CHARGING]: Smart door lock requires 4 AAA batteries (not included), According to the frequency of use, it can be used for up to 12 months. It has low battery reminder function, equipped with a USB interface for emergency charging.size:15x6.5cmMaterial:Zinc alloycolour:blackPackage Contents:1 set x door locks(Without battery)2 x 1 set x installation accessories1 x English Only the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.