Characteristics: It is mainly used to warm the shoulders, neck, waist, back, abdomen and pillow or pet bed. This USB heating pad is 20 * 10cm, the heating temperature is 35-45 degrees Light, easy to carry. It is safe and easy to use and can be attached around sewing It can be bent and washed with water. Technical data: Material: Carbon Fiber Black colour Maximum voltage: 5V Power Mode: USB Heating film: 20 x 10 cm / 7.87 x 3.94 inch Wire: 1.5 m / 59.06 inch Heating temperature: 35-45 degrees Package includes: 1 x USB heating pad Use method: 1. Connect the USB interface of the computer / 2. Connect charging device / 3. Connect the power supply with 5V 2A How to use: 1: Find a piece of quilted jacket, bath towel, etc. and insert the heating pad (fold it in half or flat, if you want to check the temperature, you can put the temperature sensor on the heating pad). 2: The heater is connected to the USB 5V2A output interface. 3: The temperature of the insulated jacket will continue to rise as the warm-up time increases and the expected temperature will generally be reached in approximately 10 minutes. Scope of application: 1. Customers who use it in their clothes should put it 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 center of the heating pad, then the pet will not emit heat when lying on it and the temperature will increase. 3. For solid products, wrap the heating pad on the product first, then wrap a layer of foam paper or heat-insulating cotton on the outside to prevent heat dissipation. Note: 1. Only in an insulated environment, such as sewing between clothes or a duvet, can it be heated to about 40 to 45 degrees and the warm-up time will be 20 to 40 minutes. 2. If the USB output interface used by the client does not reach 2A, the switch cannot be opened. 3. If the customer uses a power bank or power supply, the switch can be turned on, but it will turn off automatically after about 10 minutes because the power bank or power supply used by the customer does not reach the output power on the Product label. It is recommended that he could use a different power device.