Features: 1. Knee braces built-in heating pad provides super comfortable hyperthermia for knee arthritis to relieve pain and recover damage, keep your knees warm. 2. Heating knee pads help relieve pain and relaxation, enhances metabolism, strengthens the immune system and improves blood circulation. 3. It can be washed, the battery is removed, and the power interface is treated with insulated water. It is easy to use and protect your knees. 4. Warming and activating meridian, activate blood, clearing heat for detumescence and antibacterial. 5. Made of lightweight high-quality material, gives you more comfortable with no burdens. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow minor deviation due to manual measurement. Specification: Type: Electric Heated Knee Brace Material: neoprene Size: One size, 21.8x59cm(8.58x23.22in) Note: The USB interface is plugged into the 5V charging head of the mobile phone. The power supply does not reaches the rated power of 7.9W, and the temperature will be lower. The 9V charging head of the mobile phone can reaches the normal heating temperature! includes:1 x Electric Heated Knee Brace