USB shaver Features: Single suspension reciprocating knife the first ultra-thin low-power network power switch with blue LED lights through the USB port charge included USB plug built-in rechargeable lithium battery using the USB charging takes about nine hours can be full of . Also included a small brush for cleaning. Size: 110x54x16mm Weight: 75g The USB rechargeable shaver light weight, easy to carry, not have to worry about power, you can at any place any available USB port on your computer charge.