1. USB lithium battery charging. The lock body has a small display and buttons to increase the hours and minutes. The maimum time is 99 hours and 59 minutes.2. Horizontal and vertical tensile force destructive pull 130KG 3rd level fall protection maimum level 1 and minimum level 53. Waterproof grade four, prevent outdoor rain and splashing4. Use 4 hours a day, 30 battery life with one charge5. After 1200 charging and discharging cycles, the battery capacity will decrease by 15 after 3000 times, each charge can only last for three and a half hours.Size46 40 20mmWire length 90mm diameter 2.5mmWire head diameter 4mmMaterialABSmetalColorblackPackage contents1 lockOnly the above package contents, other products are not included.Note Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is 13cm.