1Infrared Light Joint Lighting: Equipped with 16 built in infrared light bulbs, this cordless knee massager provides targeted and deep penetration to the knee joint. 2High Frequency Vibration Massage: Featuring dual high frequency motors, this knee massager offers full range vibration massage to the muscles around the knee, providing comprehensive relief and relaxation. 3Quick Heating: With three adjustable temperature settings and carbon fiber heating, this knee massager can get temperatures of 40C on low, 45C on medium, and 55C on high, ensuring rapid and customizable heating. 4Intelligent Control: The white LED display screen allows for clear visibility and real time monitoring of massage settings. With one touch activation and simple operation, this knee massager provides convenient and efficient use. 5Long Lasting Battery: Powered by a rechargeable 2000mAh lithium battery, this knee massager offers a large capacity and stable long lasting performance. It can be easily charged via a universal TYPE C interface, compatible with most phone chargers.