[3-in-1 unlocking methods] This smart door lock supports 3 unlocking methods: fingerprint recognition, app Bluetooth unlocking (within 15 meters), and spare key unlocking. No more worrying about not being able to return home because you forgot to bring your keys. 360 fingerprint ID, easy one-touch unlocking in just 0.3 seconds. Ideal smart lock, keyless entry door lock for gates. [Smart Control with App] The smart door lock can store up to 100 fingerprints and easily manage them through the smartphone app. Easily add or delete users, set the auto-lock time to about one minute, and free your hands. Check the unlocking record to know who enters and exits your home, and clearly understand the battery status of the door lock. [Auto-lock and One-touch Lock/Unlock] Our smart door lock provides an auto-lock function to ensure that your door locks itself after a set period, so that your home is safe even if you forget. In addition, the one-touch lock/unlock function allows you to easily lock or unlock the door, and enter and leave quickly and conveniently with just one press. [Safe and Easy to Install] This smart deadbolt can be easily installed with a screwdriver in just a few minutes. It fits most US doors and can perfectly replace existing door locks. Made of durable zinc alloy for outdoor door locks, the indoor unit uses a solid ABS cover to ensure reliability and security. Power Supply:2 x AA batteries(Not included batteries) Colour:Black Material:Zinc alloy + ABS Package Contents: 1 * Front lock 1 * Rear lock 2 * Keys Only 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.