Knee Massager With Heat For Pain Relief Electric Cordless Vibration Knee Massage Features: This multi-functional knee massager is designed to relief soreness, discomfort for anyone suffering from any type of knee issues. In addition, more attention is needed in your daily life to the protection of the knee joint. With this knee massager a day, once 15-30 minutes, away from knee pain issues. Ergonomic design, fully wrapped to fit the knee joint. Built in infrared red light, constant temperature hot compress. Each time the button is touched, the buzzer prompts the function. 10 minutes timed automatic massage Low-end heating is 40 C, middle-end heating is 50C, andhigh-end heating is 55C. Parameter Rated voltage:3.7V battery capacity:3000mAh rated power:10W Input current:DC5V/2A Product Package: 1 Pair Knee Massage