1、Made of high quality aluminum alloy, tough and durable. 2、3 unlock method can be set: button / fingerprint / password. 3、3 kinds of adding a lock method: Scan / BT / Number. 4、Shared access: Share access by scanning a QR code or adding an account directly. 5、Easy to unlock quickly with app in your phone. Universal for both Android and iOS system. Go unlocked with this smart Bluetooth lock.The lock connects to your smartphone via Bluetooth. Never worry forget finding the keys any more. Features: Made of high quality aluminum alloy, tough and durable. No need to use keys to unlock, helps you get rid of worrying about keys losing. 3 unlock method can be set: button / fingerprint / password. 3 kinds of adding a lock method: Scan / BT / Number. Shared access: Share access by scanning a QR code or adding an account directly. Good flexibility: A lock can be granted to multiple users, and users can unlock multiple locks. Easily monitor activity: Including unlocking records and sharing records. Easy to unlock quickly with app in your phone. Universal for both Android and iOS system. Perfect for backpacks, luggage, wardrobes, cabinets and etc. Specification: Material: Aluminum alloy Color: Sliver BT version: 4.0 iOS system requirements: 3. 0.1 Android system requirements: 3. 0.1 Battery voltage: 3.0V Battery: 600mAh CR14250 battery Battery unlocking times: about 8000-10000 times Size: 6 x 2.3 x 9.5cm / 2.36 x 0.91 x 3.74 inch (appr.) Package List: 1 x Bluetooth Anti-theft Lock 1 x English Manual Notes: Please scan the QR code on the picture before use to download the app.