This infrared lights system combines 630 medical-grade infrared & red light to largely function as a therapy wrap with the wider lights covering the whole area on your back neck hip and shoulder. The Benefits of Red Light Therapy Wrap: Physical treatment ensures safe blood circulation stimulation muscles relax healing accelerate and pain relief. Provide relaxation to muscles and relieves muscle spasms. Reduces pain and stiffness associated with arthritis and increase local blood circulation. How to use: 5 levels of brightness can be adjusted through the controller you can choose the appropriate brightness according to your individual needs and treatment area.(L0 Level is 10W L1 Level is 20W L2 Level is 30W L3 Level is 40W L4 Level is 50W) This timer can be set to automatically turn off after 5 10 15 20 25 or 30 minutes. Features: 630 Medical grade LED lights 504 visible red lights (635 nm ) & 126 invisible NIR lights (850 nm) Near-infrared LEDs appear unlit because they’re invisible to naked eye. However they are just as powerful as the red light and penetrate body deeper. Note: 1. Please make sure your skin is cool and dry when using the lights wrap. 2. Do not strike or step on the lights system for it may damage the lights. 3. Not intended use on face therapy. 4. Use it 2-3 times a day each time 20 minutes. Attention People with heart disease or heart pacemaker can not use this light therapy system. Expectant mother skin-ulcers and allergic people can not use it. Please be patient as it may take several weeks or longer to experience optimal relief. Effect may be different to different people as their conditions can be varied and complex.