describe:1. This knee joint massager combines red light therapy, low-intensity laser therapy, kneading massage (air pressure and vibration) and far-infrared heating therapy into one to ensure good therapeutic effects.2. Imitate artificial massage: 4D air bag wrapping relaxes the soft tissue of the knee by squeezing the air bags around the knee. Automatically fill and relax to achieve the effect of massaging your knees3. The battery capacity is 2600mAh, which can be fully charged in 3 hours and can be used for 1-1.5 hours.4. The appearance design is in a 90-degree shape, suitable for knee, elbow, and ankle pain relief. The waistband is flexible and can be adjusted in size according to customer needs, suitable for all types of knees;5. Humanized design, large LCD touch screen, easy to operate; portable, non-invasive, no side effectsSpecification:white colorMaterial: ABSVoltage: 5VPower: 5WTime: 15/20/25/30 minutesBattery capacity: 2600mAhCharging time: 3 hoursUsage time: 1-1.5 hoursSize: 17.5*20.5cmProducts include1*Host1*USB data cable1*Manual1 boxnotes:1. Due to differences in lighting and screen settings, the color of this item may be slightly different from the picture.2. Please allow slight size differences due to different manual measurements.