Using soft fabric, built-in thermal insulation fiber heating material, comfortable and wear-resistant, durable. The imported composite fiber heating wire is used, the heating wire is densely guided, heats evenly, the temperature is high, it is not easy to oxidize, burn the circuit, etc., and the service life is long. You can place it directly in your jacket, vest and other clothes to keep warm and warm using a 5V 2A power supply such as a computer, power supply or power supply (this product does not include a power supply). It has a certain degree of bending and waterproofing, even heating, it can be washed, but it should not be submerged for a long time in water (fabric sticks together, long-term soaking can affect the adhesion of the adhesive). The switch adopts full waterproof coating for better waterproof effect. The electric cable is characterized by folding resistance, water resistance, tensile strength and long service life. Repeated cleaning does not affect the use. It is lightweight and comfortable and can be worn comfortably when camping outdoors or other winter activities. Specification: Item Type: Heating Pad Material: composite fiber Power Supply: 5V2A Power Mode: USB Charging Adjustable temperature: 45 -65 Gear setting: red (high gear), blue (medium gear), green (low gear) Size of single heating pad: ok. 160 x 250mm / 6.3 x 9.8 inches Scope of application: Vests, clothes, belts, vests, waist protectors, shoes Properties: Washable, lightly wiped, insulated, does not electrify, is resistant to stretching List of packages: 1 x heating pillow Note: 1. The heating fabric should be connected to a 5V2A power supply or 5V2A power bank for heating to achieve the desired effect. If the output power is not reached, the temperature control switch light will not turn on or the heating effect will not be visible when high-temperature equipment is used. 2. When using, wrap the heating pad up and down with a thick cotton cloth, e.g. towel. This is to prevent rapid heat dissipation. You cannot measure the temperature when the device is placed on the table.