Descriptions: This USB heating pad is 20*10cm, heating temperature is 35-45 degrees.It is safe and easy to use. It is mainly used to warm shoulder, neck, waist, back, abdomen and cushion or pet bed. Light in weight, easy to carry. Features: It is mainly used to warm shoulder, neck, waist, back, abdomen and cushion or pet bed. This USB heating pad is 20*10cm, heating temperature is 35-45 degrees Light in weight, easy to carry. It is safe and easy to use, and can be fixed around the sewing It is can be bended and can be washed by water. Specifications: Material: carbon fiberColor: blackMaximum voltage: 5VPower supply mode: USBHeating film:20 x 10cm/7.87 x 3.94inchWire: 1.2m/47.24inchHeating temperature: 35-45 degrees Use method:1. Connect the computer USB interface / 2. Connect the charging treasure / 3. Connect the power adapter with 5V 2AHow 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 x USB Heating Pad Note:1. Onlyin the insulated environment such as sewing between clothes or a quilt,it can be heated to about 40 to 45 degrees, and the heating time will be 20 to 40 minutes.2. If the USB output interface used by the customer does not reach2A, the switch cannot be opened.3. If the customer uses the power bank or power adapter, the switch can be turned on, but it will automatically turn off after about 10 minutes, because the power bank or power adapter used by the customer does not reachthe output power on the product label. It is recommended He can use another power supply device..