Intelligent Lock Password Key App Three Modes Unlock Anti-theft Waterproof U-shaped Lock Smart Life.    Features:  - [Engineering Plastics]: The use of internationally imported engineering plastics makes the lock more sturdy, wear-resistant and anti-theft, and adopts IP55 waterproof.  - [Long running time]: Smart padlock has lower power consumption and longer standby time. A single charge can support up to 3 months of standby time.  - [Chip R&D]: Adopt advanced chip technology, Master chip: T1 import CC2541F256, Driver chip: LG Motor Driver IC, to escort you.  - [Phone unlock]: Three unlock modes, allowing you to do whatever you want. When the key is lost or forgotten, you can use the mobile APP to unlock, and the mobile APP can check the unlocking record at any time.  - [Safety guarantee]: With CE and ROHS certification and three safety guarantees, you can use it safely.  - [USB charging port]: It can charge mobile power without worrying about accidental power failure. Specification:  Material Aluminum alloy, alloy steel;  Master chip T1 import CC2541F256;  Driver chip LG Motor Driver IC;  Color ;  Black;  Unlocking method Key password + smart APP + key;  Produce weight 1KG;  Produce size 101x425mm;  Power supply Lithium battery;  APP interface Bluetooth;  Wireless distance 1m;  Low voltage prompt Key password + smart APP + key;  Number of unlocks More than 1000 times;  Battery capacity 400 Milliampere;  Working current Less than 100 Mixere;  Standby time More than 3 momths;  Normal use times More than 2000 times;  Relative humidity 30%-90%;  Operating temperature -15℃~40℃;  Supporting device Android / iOS;    Package Included:  1 Pc x  Lock.