Characteristics: 1. Made of high-quality carbon fiber heating material, sturdy, durable and long service life. 2. Safe and easy to use, it can be sewn onto any fabric or seat cover. 3. Convenient to power supply, just plug it into the USB port of a power bank or a 5V 2A power adapter. 4. The heating pad is foldable and not easy to deform. Easy to clean and washable with water. 5. Widely used to warm shoulders, neck, waist, back, abdomen and pillow or pet bed. Specification: Item Type: Electric Heater Pad Model: 3515 Material: Carbon Fiber Heating Material Color: as shown in the photos Input: 5V, 2A Power: 8W Switch: 3 modes of adjustable temperature Application: waist, pet, pillow, belly etc. Size: 35 x 15cm / 13.78 x 5.91 inch (Approx.) How to use: 1: the switch can't open; 2: It can be turned on but will automatically turn it off; 3: The switch can be turned on, but the temperature cannot be adjusted. If it appears below the mid-range, it will automatically turn off So you need to use a real 5V2A output charger or a power bank How much heating time mainly depends on the real capacity of the charging treasure, after testing the real capacity of the charging treasure 10,000mAh, high quality: 4 hours, medium: 7 hours, low: 10 hours, the above is about plus or minus 10 minutes error Washing instructions: Take out the power bank, add neutral hand wash detergent, do not forcefully knead or tamp, wash clothes with natural ventilation dry before use Package List: 1 x USB electric heating pad 1 x Manual Note: 1. The power of the heating cap is about 8.5W. Connect it to the 2.1A output port. 2. If it is not used for a long time, do not use the power bank. 3. Do not use hot water or strong acid detergent. 4. Do not use electricity with wet clothes. Turn off the power and stop using it. 5. The usage time depends on the capacity of the power bank. 6. Do not allow use by incapacitated people, infants, or heat insensitive people. 7. No needle scratches heating fabric, no one uses stringent indoor electrification. 8. Do not use it when wet. Dry before use