1. USB lithium battery charging. The lock body features a small display and buttons to set the time, with a maximum setting of 99 hours and 59 minutes. 2. Horizontal and vertical tensile strength (destructive pulling) 130KG; level 3 anti-fall protection (scale ranges from level 1 to level 5, with level 1 being highest). 3. Waterproof rating IP4, protects against outdoor rain and splashing water. 4. With 4 hours of daily use, the battery lasts up to 30 days on a single charge. 5. After 1200 charge and discharge cycles, battery capacity decreases by 15%; after 3000 cycles, runtime per charge reduces to 3.5 hours. Size: 46 x 40 x 20mm Wire rope length: 90mm; diameter: 2.5mm Wire rope head diameter: 4mm Material: ABS + metal Color: black Package Contents: 2 x Lock Note: Light and different displays may cause slight color variations between the item and the image. Measurement allows an error of +/- 1-3cm.