USB lithium battery charging. The lock body features a small display and buttons to adjust hours and minutes, with a maximum setting of 99 hours and 59 minutes. Horizontal and vertical tensile strength (destructive pulling) 130KG, 3rd level anti-fall (scale from level 1 to level 5, where level 1 is the highest). Waterproof grade 4, resistant to outdoor rain and splashing. Battery lasts up to 30 days with 4 hours of use per day on a single charge. 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; diameter: 2.5mm Wire rope head diameter: 4mm Material: ABS + metal Color: 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 to vary slightly from the real thing. Measurement allows an error of +/- 1-3cm.