Feature●Fiber Heating Material, Safe and Durable: The heater pad uses a soft fabric with built-in heating material of the fibers, and is insulated to ensure safety. It is comfortable and feels very good on the skin, and has excellent abrasion resistance and durability●(Heating Evenly) It is foldable and water resistant, and can be heated evenly●3 Modes and Adjustable Temperatures: The heater pad can be adjusted to 3 different temperature modes. You can freely adjust it according to the actual situation. You can also set the timing mode for 30 minutes, making it very practical●Promotes blood circulation: Relieves back stiffness and fatigue and relieves pain. Suitable for a variety of occasions such as winter commuting to work or school, exercising, and mountain climbing●Heater pads only use 5V 2A power source such as computers, power adapters, and power bank (sold separately). Easy to use by connecting your computer, car, or mobile batteryDescription Heater Pad, Heating Sheet, Electric Heating Heater, Fiber Heater, Winter, Cold Protection, Electric Fabric Heater Pad, Heel Pad, Waist, Abdomen, USB Heating, Foldable, 5V/2A, 3 Levels of Temperature Control, 30 Minutes Timer Included