1. USB lithium battery charging. The lock body features a small display and buttons to set hours and minutes, with a maximum timer setting of 99 hours and 59 minutes. 2. Horizontal and vertical tensile strength (destructive pulling) 130KG; meets level 3 anti-fall standard (scale ranges from level 1 to level 5, with level 5 being the highest). 3. Waterproof rating IP4, protects against outdoor rain and splashing water. 4. Battery lasts up to 30 days with typical usage of 4 hours per day on a single charge. 5. After 1200 charge and discharge cycles, battery capacity decreases by 15%; after 3000 cycles, runtime per charge is reduced 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: Lighting and monitor differences may cause slight color variations between the image and actual item. Measurement tolerance is +/- 1-3cm.