1. USB lithium battery charging. The lock body has a small display and buttons to increase the hours and minutes. The maximum time is 99 hours and 59 minutes. 2. Horizontal and vertical tensile force (destructive pulling) 130KG 3rd level anti-fall (maximum level 1 and minimum level 5) 3. Waterproof grade four, prevent outdoor rain and splashing; 4. Use 4 hours a day, 30 days of battery life with one charge 5. After 1200 times of charging and discharging the battery, the battery capacity drops by 15%; after 3000 times, each charge can only last for three and a half hours. size:46 x 40 x 20mm Wire rope length 90mm; diameter 2.5mm Wire rope head diameter: 4mm Material:ABS+metal colour:black Package Contents: 2 x lock Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.