OS8816BLE Bluetooth Smart Door Lock, Mobile Phone APP Remote Unlock, Zinc Alloy Material, with Mechanism Keys

Features 1. Emergency turn on: Mechanical key is turned on. 2. Backup power: 5V USB external power supply, 4 x AA batteries (not included). 3. Channel mode: Can be set to normally open mode. 4. Bluetooth Users: 300 Groups. 5. Password capacity: 1 group management password, 49 group user passwords. 6. Card capacity: 1 management card, 199 opening cards. 7. Working hours: 4 1.5VAA batteries, 10 times a day, 1 year life. 8. Standby power consumption: =<30mA. 9. Installation method: DIY easy to install without line. 10. Applicable categories: Wooden doors. 11. Applicable door thickness: Standard: 38mm-55mm (optional 30-35 door thickness). Package List 1. Front panel x 1 2. Rear panel x 1 3. Rear handle x 1 4. Front handle x 1 5. Waterproof rubber pad(front and rear) x 1 6. Lock latch x 1 7. Lock rods x 3 8. Screw Accessories x 1 9. Buckle box x 1 10. Buckle panel x 1 11. Key x 1