Features Mainly used for the heating of insoles, slippers to keep warm. This USB heating pad is 19.6*6cm, heating temperature is 35-50 degrees. Light in weight, easy to carry. It is safe and easy to use, and can be fixed around the sewing. Heating Film can be washed, bent, rubbed and folded. Descriptions:This USB heating pad is19.6*6cm, heating temperature is 35-50 degrees.It is safe and easy to use. It is mainly used for the heating of insoles, slippers to keep warm. Light in weight, easy to carry. Specifications:Material: carbon fiber Color: black Maximum voltage: 5V Power supply mode: USB Heating film:19.6 x 6cm/7.72 x 2.36inchWire: 1.5m/59.06inch Heating temperature: 35-50 degrees How To Use:1: Find a piece of quilted jacket, bath towel, etc., and put the heating pad in (fold it in half or flat, if you want to test the temperature, you can put the temperature probe on the heating pad). 2: The heater is connected to the 5V2A USB output interface. 3: The temperature in the padded jacket will continue to rise as the heating time increases, and the expected temperature will generally be reached in about 10 minutes. Attention: If it is exposed in the air or placed on the table to test the temperature, a little bit of heat will be dissipated. Application Range: 1. Customers who use it in their clothes, let them put them in their clothes to test the temperature. 2. For pets, such as cats and dogs, you can put the temperature probe to test the temperature in the middle of the heating pad, then the pet will not radiate heat when lying on it, and the temperature will rise. 3. For solid products, wrap the heating pad on the product first, and then wrap a layer of foam paper or thermal insulation cotton on the outside to prevent heat dissipation. Package Included:1 pair x USB Heating Pad Package List