Features: 1A triangular compression piece is added to the shoulder wrap to give better pressure to the shoulder. 2Heating plates are built into the shoulders and neck to reduce shoulder discomfort, making the shoulders more comfortable. 3Large heating area and stable heating. Triangular shape for better heat locking and shoulder fixation. 4Help improve blood circulation, dredge meridians, relieve local body fatigue and pain, relieve shoulder fatigue and soreness. 5Power switch control key is on the USB cable, which is more convenient to use and can be adjusted at any time. Item Type: Shoulder Wrap Material: Nylon polyurethane carbon fiber heating cloth Upper Shoulder Part: Approx. 45cm / 17.7in Lower Shoulder Part: Approx. 35cm / 13.8in Heating: Red light for high-grade temperature, green light for mid-range temperature, blue light for low-range temperature Power Supply: It is recommended to use the charger, mobile phone charger plug and socket or USB power supply interface on the computer (this product does not include power supply). Usage: First put the shoulder wrap on the shoulder to adjust the wearing, and then put on the shoulder strap, adjust the tightness of the shoulder strap for better fixation, the hook is fixed on the shoulder; Connect the USB cable to the shoulder strap (the interface is inside the triangular part). Insert the power into the USB port, click the button to display red light, click again for green light, and then click for blue light, press again to turn off the heating Caution: Do not wear it when you are sleeping, so as not to burn due to long time using 1 x Shoulder Wrap 1 x USB Cable