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.<br> 2. Horizontal and vertical tensile force (destructive pulling) 130KG 3rd level anti-fall (maximum level 1 and minimum level 5)<br> 3. Waterproof grade four, prevent outdoor rain and splashing;<br> 4. Use 4 hours a day, 30 of battery life with one charge<br> 5. After 1200 of charging and discharging the battery, the battery capacity by 15%; after 3000 , each charge can only last for three and a half hours.<br> size:46 x 40 x 20mm<br> Wire rope length 90mm; diameter 2.5mm<br> Wire rope head diameter: 4mm<br> Material:ABS+metal<br> colour:black<br> Package Contents:<br> 1 x lock<br> Only the above package content, other products are not included.<br> 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.