Electronic lock bought for 500 from Amazon, new, never opened. It has four card slots and a fingerprint scanner, suitable for the whole family. You can see from the app who opened the door and when. It has a battery, charging, and a key. Features: ✅ [Opening Records]: You can check and review the lock opening records via the app, and you can also share the temporary password/electronic key with visitors, housekeepers, babysitters, tenants, guests, and others. ✅ [5 Unlocking Methods]: Our smart door lock has five unlocking options: Keyless entry via Wi-Fi through the Smart Life app; fingerprint (biometric); M1 RFID card; keypad password; and a mechanical key for emergencies. ✅ [Fingerprint Recognition and Anti-Peep System]: The fingerprint recognition system prevents the duplication of artificial fingerprints. It is supported by an anti-peep password feature by entering random digits before or after the correct password. This helps to better develop the protection for your door. ✅ [Simple and Fast Installation]: You can quickly install smart door locks on the left side of the door by following the instructions. ✅ [In Case of Emergency, You Can Use a Backup Battery]: When the electronic door lock battery runs out, it will make a sound to alert you. A portable power source or any power source with a micro USB connector can be used to temporarily charge the electronic lock.