1. USB lithium battery charging. The lock body has a small display and buttons to adjust hours and minutes. The maximum time setting is 99 hours and 57 minutes. 2. Horizontal and vertical tensile strength (destructive pulling) 130KG. Level 3 anti-fall protection (scale from level 1 to level 5, with level 5 being the 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, each charge lasts approximately 3.5 hours. Size: 46 x 40 x 20mm Wire rope length: 90mm; wire diameter: 2.5mm Wire rope outer diameter: 4mm Material: ABS + metal Color: black Package Contents: 1 x lock Note: Other items not included. Lighting and monitor differences may cause slight color variations between image and actual item. Measurement error allowance: +/- 1-3cm.