Chinatera 5V Laptop USB Powered Heated Stripe Half & Full Finger Winter Warm Hand Warmer Gloves Washable (Coffee) Energy saving , Faster temperature rise, Desired temperature can rise to within a few seconds Can remove the hot clip. USB Power: 5V, Cable Length: Approx.139cm including the connectors Temperature range: 40 - 45 Connect pc/laptop to internet by USB 2.0 cable. Include: 1 Pair of Gloves