Simple and safe: use the usb port to supply power, it is convenient and safe. Wrist guards are soft and comfortable, specially designed for long time computer users. Washable design:. Please remove the inside heating plate before you wash it. It is the perfect gift for everyone including yourself. Size: 18x15.5x7cm Weight:6.70oz Operating voltage: 5v 0.5 The frequency of power: 50hz Temperature range: 40 ~ 50 Heating time: 1 ~ 3 (min) Low power consumption, high security and energy conservation
