Features 1. Relieve knee pain related to arthritis, bursitis, strain, sprain, meniscus tear; 2. Built-in mesh bag for ice cubes, used for cold compress, can also be used for moxibustion; 3. Adjustable position, two bifurcated belt design, hook and loop closure, can also be used for calf, thigh, arm, to relieve muscle soreness and cramps; 4. 1 button control and 3 heat Settings, very easy to operate, can fully control the heating temperature and time; The USB cable for portable use, can be inserted into any power supply with USB port, easy to use; 5. Quality Guarantee. We have faith in our product and always back it up with trustful customer service, please reach out to us if you have any questions or problems about our products. Specification Material: Diving cloth Size: USB cable 2m, adapter cable 1.75m, product expansion length 13.5cm wide 18cm (1) When USB is inserted into USB port to obtain power, the output is about 5V/D C: Highest (red) : the temperature is 50, high temperature, can be used for a long time; Medium (white) : the temperature is 45, warm, can be used for a long time; Minimum (blue) : the temperature is 40, neither cold nor hot, can be used for a long time. PS: if it is connected to a portable power supply with an output current greater than 500mA, the temperature may be higher than above. (2) When using the adapter, the fixed output is 7.9V/D C: Maximum (red) : temperature 65, high temperature, recommended use time of 10 minutes; Medium (white) : temperature 55, relatively hot, recommended use time of 30 minutes; Minimum (blue) : temperature 45, warm, can be used for a long time. Package Includes: 1 x Knee Pain Massager