Tuya App Remote Unlock - Type "9#" on the lock keyboard Request to unlock the phone remotely You can unlock it anywhere. Shared Guest Password - You can share a temporary password anywhere Allowing friends to unlock your door when you are not . Semiconductor Fingerprint Sensor - Living biometric fingerprint recognition Preventing fake fingerprint, intelligent memory,hiht sensitivity. Virtual Password - You can enter any digital number before or after the correct password. Type-C emergency power interface - When the power of the door lock is depleted Can be unlocked through Power Bank. Hidden Mechanical keyhole - When the power of the door lock is depleted Can be unlocked through mechanical key Old unlocking . No Need Gateway to Connect Wi-Fi - There is a router inside the lock,no need to buy extra gateway. Simple installation - You can easily replace your old door lock. Due to different product batches, the appearance , which does not affect the use. Colour:Black Material:Metal+Plastic Package Contents: 1 * Electronic Door Lock Kit 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.