Three-Gear Temperature Adjustment: With Electric Heated Brace with one button control and three-gear temperature regulation, it can quickly rise to the set temperature within the 30s according to the ambient temperature.Excellent Material: Made of heat-generating carbon fiber, Elbow Heating Wrap is corrosion resistant, high-temperature resistant, good insulation, and moisture resistant.Helpful Function: Elbow Wrap Heating Pad is practical and helpful since it is an effective heating pad for knee joint injury, rheumatism, meniscus tear, tendonitis, sprain, and swelling.Charged By USB: Wrist Heating Pad can be easily plugged into any USB-compatible device, such as a laptop, travel charger, or other USB devices because it is powered by USB, plug and play.Guarantee Security: Adopts a 5V safe low voltage, which is far below the 36V safe voltage of the human body, Hand Wrist Heated Wrap can ensure the safety of use.Specification: Product function: hot compress therapyCare area: elbow guardSettings: 3 settings adjustableHeating material: carbon fiber heating sheetPower supply voltage: 5V (far lower human body safety voltage)Product size: about 360mm*210mm/14.17*8.27inPacking List: 1 x Elbow Heating Wrap1 x USB Adapter Cable