DGYAO LED light phototherapy device utilizes a combination of 660 nm deep red light and 850 nm near infrared light to generate heat improve blood circulation and sooth muscle and joint soreness. Red Light Phototherapy for Body - Infrared light phototherapy can effectively relax muscle and joint soreness. It is suitable for use on the back neck hands shoulders knee wrist hipetc. and can also help relax muscle fatigue and soreness. Massager and Vibration Device - This infrared light phototherapy pad can provide powerful vibration motors for waist soothing massage which can further stimulates circulation relax muscle and maximize the effect of the red & near infrared phototherapy. Lightweight Adjustable and Safe- The LED light phototherapy waist belt can be carried in a backpack with adjustable buckle fits most people s wasit no side effects. PU material surface is waterproof and easy to clean. BEST GIFT & WARRANTY- Beautifully packaged can be used as birthday gift anniversary gift elder gift etc. One Year Warranty Free Lifetime Replacement Parts 90 Days Free Returns.