Features： 1、Heat Therapy for Pain Relief: Using this arm heating pad cover can help alleviate pain and healing, perform intense heat therapy on painful areas, improve blood circulation, and accelerate the recovery of tendinitis, torn or broken ulnar collateral ligament, and fractures. 2、Three Level Temperature Regulation: The elbow protector is equipped with a carbon fiber heating wire, which releases far infrared wavelengths and allows the heat to radiate deep into the human skin. The three level temperature regulation can customize and design the optimal temperature for you to use in heating or hyperthermia. 3、Safe and Reliable: The heating pad is powered by a mobile USB, which is convenient to use and safe to operate. It is powered by 5V voltage, far below the safe voltage of 36V for the human body, and has lower electrical hazards compared to 110V AC power supply. 4、Quick Heating: After inserting the heating elbow protector into the power supply, it starts heating within a few seconds and rises to the target temperature within 3 to 5 minutes, providing fast and intense heat to the painful area, saving time. 5、Portable Heating Pad: The heating pad is 43 x 25.5 cm, equipped with a long USB cable, compatible with most 5V USB sockets, and you can use it anytime; When going out, the power bank can also serve as a power source for the heating pad. Specification： Item Type:Heated Elbow Wrap Product Material: OK cloth, carbon fiber Product Size:Approx. 43 x 25.5cm / 16.93 x 10.04 in (with elastic material and slight error in manual measurement) Heating Temperature: Three levels, red 65 ℃, white 55 ℃, blue 45 ℃ Usage: Plugged in for use Cleaning Method: Washable Package List： 1 x Heated Elbow Wrap 1 x Cable