USB Powered Laptop Heating Knitting Wool Hands Warm Gloves Heated Warmer - Black USB Powered Laptop Heating Knitting Wool Hands Warm Gloves Heated Warmer - Black With this USB Hands Warmer, you don't need to worry your hands getting chilled when working, typing, reading or doing other things in cold winter. Just plug it into the USB port to heat up the hand warmer. Moreover, you can unplug the USB cable if you are not working in front of the computer.