Features: 1. This product penetrates through the gentle heat of moxibustion fire and conducts through the meridians, so as to achieve the effect of hot compress. 2. Made of carbon fiber, it has the characteristics of corrosion resistance, high temperature resistance, good insulation and friction resistance. 3. One-key control, considerate sailing, set the temperature and protect the river; according to the ambient temperature, it will rise to the set temperature in 30S (the bottom gear is about 45 degrees, the middle gear is 52 degrees, and the high gear is 60 degrees). 4. Using USB power supply, strong energy saving, easy to use, and at the same time for (5V 2A) voltage output, far below the human body safety voltage of 36V. 5.USB interface: USB cable is easy to use, mobile power supply, charging plug, laptop, car charger can be charged. Specification: Item Type: Heated Elbow Brace Color: Black Size: Approx. 21 x 38cm/8.27 x 14.96inch USB Length: Approx. 1.2m/47.2in Package List 1 x Heated Elbow Brace 1 x Manual 1 x Data Cable Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Product flow voltage input needs to reach 5V2A to start work, such as "can not be turned on, can not be heated" phenomenon, please check whether the input voltage and current meet the standard. Package List 1This product penetrates through the gentle heat of moxibustion fire and conducts through the meridians, so as to achieve the effect of hot compress. 2Made of carbon fiber, it has the characteristics of corrosion resistance, high temperature resistance, good insulation and friction resistance. 3Onekey control, considerate sailing, set the temperature and protect the river; according to the ambient temperature, it will rise to the set temperature in 30S (the bottom gear is about 45 degrees, the middle gear is 52 degrees, and the high gear is 60 degrees). 4Using USB power supply, strong energy saving, easy to use, and at the same time for (5V 2A) voltage output, far below the human body safety voltage of 36V. 5USB interface: USB cable is easy to use, mobile power supply, charging plug, laptop, car charger can be charged.