Features: Support multiple users to share the same unlocking permissions. Support to check the lock record at any time. Replaceable battery, low power consumption and long standby time. Support for close range automatic lock. No mechanical key, supporting trigger Bluetooth signal to unlock to reduce power consumption. Apply to Sharing Cabinet, Storage Cabinet, Drawer, Wardrobe, Showcase, Door Lock, Data Cabinet, File Box, etc. Specifications: Material: lock body: plastic lock beam: copper Working voltage: 2.5-4.2V Communication mode: Bluetooth Unlocking mode: mobile APP Bluetooth mode Unlock time: about 2 seconds Waterproof: no support Support equipment: for IOS/ Android 4.3 or more Power supply mode: 800 Ma Charging mode: replaceable battery (Built-in )( not rechargeable) Duration: 1 years (Ten times a day, 1000 tim es more) Size: Lock body: 70*40*20mm/2.8*1.6*0.8in Lock beam: 10mm Package Weight: 88g/3.1oz Package List: 1 * Smart Lock (Battery Built In) 1 * User Manual .