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: 1 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."