1. USB lithium battery charging. The lock body features a small display and buttons to adjust hours and minutes. Maximum timing capacity is 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 maximum). 3. Waterproof rating IP4, protects against outdoor rain and splashing water. 4. With 4 hours of daily usage, 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, each charge supports approximately 3.5 hours of operation. Size: 46 x 40 x 20mm Wire rope length: 90mm; wire diameter: 2.5mm Wire rope diameter: 4mm Material: ABS + metal Color: black Package Contents: 1 x lock Note: Light and display differences may cause slight color variation between the image and actual item. Measurement error allowed within +/- 1-3cm.