Features: 1. The multifunctional heated shoulder guard can be used not only to protect the shoulders, but also to protect the knees and elbows. 2. This heated shoulder pad is made of high-quality diving fabric, light and soft, good elasticity, not easy to pilling, comfortable to wear and easy to carry. 4. Type A:Two-in-one heating and massage, 3-level heating,and three vibration modes for you to choose. Type B only has Heating Function,6-level adjustment. You can enjoy the three functions at the same time or separately. 5. The heating pad can be wrapped and locked on any leg or arm that needs hot compress, it is not easy to slip off, you no longer need to hold it by hand. 6.Equipped with a digital display controller,Type A key button design, Type B touch screen key button design.the panel displays the temperature and power, you can use the controller to control the temperature and vibration mode, the operation is simple and convenient. Type A Type B Type A Specifications: Battery capacity: 4000mah Third gear temperature: 45 - 55 - 65 Third gear vibration Length of long strap: 68cm Short strap length: 30cm Length of charging line: 100cm Working voltage: 5V Working current: 1550mA Package size: 18.3 * 13.2 * 8.2 Product gross weight: 417g Type B Specifications: Material: Diving fabric Color: grey Size: 72*23cm Weight: 370g Packing size: 18*13*8cm Battery capacity: 3000mAh Packing List: 1* Heated knees pad 1* Extension strap 1* User Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.