Hi5 Hertz Electric Vibrating Knee Massager is designed as a healthier and more moderate way of physical therapy to help ease the joint discomfort, muscle stiffness and joint swelling. It integrates the four green therapy methods into one: infrared and heat therapy, laser therapy, and comfortable vibrating massage. Its high-end operating design adds the sense of science and modern, the environmental and skin-friendly material also adds the comfort during the massage. Atrractive functions Ergonomic design The ergonomic design is 360° wrapping with 3 levels of vibration to release muscle stiffness and soreness and you can choose it according to your own situation. Constant hot compress Hi5 Hertz has 3 levels of heating to promote blood circulation and realize effective constant hot compress therapy: 40°C, 42°C, and 45°C, as warm as a hot towel. Infrared and laser therapy Hi5 Hertz is with infrared and laser therapy, which can effectively relieve the pain and soreness that have been pestering you. Read more Read more Large capacity and smart light indicator Hi5 Hertz selects 3000mAh large capacity lithium battery so that it has ultra long run time, and one time of full charge can be used for over 20 days. The blue light keeps illuminating when the massager turns on. The blue light flashes when lack of power. Excellent motor and ultra low noise Hi5 Hertz selects excellent motor to realize the smooth massage, besides it adopts advanced noise reduction technology so that you can enjoy the massage as quite as in a library and you don't need to worry if it will disturb other people around you. Breathable mesh and adjustable Velcro The material is unstuffy and skin-friendly, and the Velcro is adjustable with strong stickness. So you don't need to worry it will cause you skin itchy or uncomfortable. Read more