1. Increasing age or strenuous exercise all year round will cause imbalance in the absorption and metabolism of synovial fluid in the knee joints, resulting in effusion. Once the effusion in the knee is too much, it will cause repeated discomfort in the slightest, and functional deterioration and inability to walk. Keep far from knee joint discomfort and eliminate fluid accumulation is the key. Our massager can help you.2. Infrared light knee massager: reduce knee discomfort in all directions, bid farewell to knee discomfort, and get rid of dampness and coldness of knee joints. The adjustable hook and loop fastener has strong stickiness, and it is not easy to fall off when adjustable.3. Applicable to: sports injuries, wear and tear caused by running and fitness exercises; knee joint soreness, numbness, and discomfort; joint swelling with bone-piercing feeling; poor blood circulation and chills.4. Light irradiation to remove joint effusion: built-in light infrared sensor lamp, wavelength 615-650NM, wavelength 4-16 nanometers, irradiate the knee joints directly to the deep layer of the knee. It can purify body fluids from impurities in the blood and make blood circulation flow faster.5. High-frequency vibration massage: Built-in high-frequency vibration motor can perform a full range of vibration massage on the muscles of the knee, so that the knee can fully release the pressure.6. Red light irradiation activates cells: Built-in 11 red lights irradiate the knee joints, deep into the bottom of the muscles to make the knee joint cells more vigorous.7. LED touch screenIntelligent control: white light LED display screen, clearly visible, real-time control of massage status, one-key start operation is simple, making the product more convenient and quick to use. When using the Type-c charging port for the first time, please fully charge the product for about 2-3 hours.8. Quickly warm up and warm the knees with hot compress: The three-level temperature heat can penetrate the skin, speed up blood circulation, dredge the meridians, and keep the knees far from dampness and cold. Low-end temperature: 40; Middle-end temperature: 42; High-end temperature: 45.Specification:Blue light indicator:Steady on: The machine startsFlashing: Low batteryBreathing: ChargingMaterial: ABS+polyesterBattery capacity: 3000mAhRated voltage: 3.7VGross weight: 0.977kgInput current: DC5V---2APackage Includes:1*Massage1*Instruction1*USB Charging cable