Features: 1. Made of polyester cotton cloth material lightweight comfortable and soft can improve the heating effect and maintain the temperature. 2. Applicable to multiple occasions: very suitable for outdoor activities such as camping hiking skiing fishing office etc. You can put it in your coat to keep it warm and decent. 3. USB charging fast and long-lasting warmth: The USB interface is compatible with most mobile power supplies on the market (not included). 4. The electric heating sheet is specially designed for men and women giving you a warm feeling in the cold winter. 5. This is an excellent holiday gift for family and friends especially suitable for the elderly and outdoor enthusiasts. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: Polyester cotton cloth Size: 17*24cm Colour: Black Voltage: 5V Switch type: online three gears can be timed switch Power supply mode: USB multi-function power supply includes: 1 x Electric USB Heating Sheet "