1With fingerprint, Bluetooth, and key three unlocking methods, it is more convenient to unlock, no longer afraid that the key will not be able to unlock. 2This brake lock is constructed with sturdy aluminum alloy and stainless steel material, keep working in rainy days and will not get rusty, durable. 3The fingerprint collector uses a semiconductor live fingerprint sensor, which has high security. Speed recognition, fast unlocking, efficient and convenient. 4The operation is simple, 20 sets of fingerprints can be stored, and can be managed directly in the smart lock. Suitable for most bicycles and mountain bikes with disc brakes. 5It is exquisite and compact, which can be put directly into the pocket for easy carrying and does not take up space. It supports USB charging, which is very convenient. Item Type: Disc Brake LockMaterial: Aluminum Alloy + Stainless SteelColor: As shown in the pictureWeight: Approx. 225g / 7.9ozBattery Type: 3.7V lithium battery, battery model: 751525, battery capacity: 220mAh (built-in battery)Fingerprint Collection Time: 0.5SFingerprint Matching Time: 1SFalse Rejection Rate (FRR): <1%False Accept Rate (FAR): <0.002%Number of Fingerprint Groups: 20 groupsAPP: for Android, for IOSUnlocking Methods: Fingerprint, Bluetooth, and key three unlocking methodsBluetooth Version Number: 4.2Charging Method: USB data cableApplication: Bicycles, bikes, etc. 1 x Disc Brake Lock2 x Key1 x Sheet of QR Codes(2pcs)1 x USB Cable1 x Instruction Manual 1. Please allow 1& 8209;2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.