Fingerprint Password Mobile Phone App Smart Lock Digital Electronic Room Door Handle Lock

* 4 ways unlock: fingerprint, password, key, app.
* DIY Installation: fit US standard door, Backset 2-3/8″(60mm) and 2-1/8″ (70mm), door thicknesses from 1-3/8” to 2-1/8” (35mm -55mm). No wiring and no drilling. Fit both left handed and right handed doors.
* Emergency Supply: requires 4 AAA batteries (not included), According to the frequency of use, it can be used for up to 6 months. It has low battery reminder function, equipped with a
Type-C interface for emergency supply.