Safe and easy to use, can be sewing onto any cloth or seat cover.Widely used for warming shoulder, neck, waist, back, abdomen and cushion or pet bed.Convenient to power, just connect it to USB port of computer, power bank, or power adapter of 5V, 2A.Comes with a 1.5meter extension USB cable so you will not worry about cable length.It is easy to clean and can be washed with water. 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. 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. Specifications: Material Carbon fiber Color Black Maximum Voltage 5V Connector USB Pad Size Approx. 23 x 29cm / 9.05 x 11.41" Cable Length 1.5M / 59" Temperature 35℃-50℃(after 20min~40min) Package Includes: 1 x Heating Pad，1 x USB Cable Note: 1. If this heating pad is used in clothes, quilt or pillow, the temperature can be 40~45℃ after 20 minutes. If there is no covering, the temperature might be only 35℃ after 30 or 40 minutes(from room temperature >10℃ ). 2. If the USB output interface used by the customer does not reach 2A, 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 reach the output power on the product label. It is recommended He can use another power supply device.