Electric Heating Therapy Knee Warm Knee Pad Brace Massage,Spec: Single With Vibration Features. 1. Large hot compress, wrapped around the knee, deep relief of joint discomfort 2. Acupoint vibration massage, simulating the massage therapist pounding technique, relieve the discomfort of soreness and swelling (only vibration models have this function) 3. Heated knee massager has 5 heating levels (from 40-60 degrees Celsius 104-140 degrees Fahrenheit), NTC temperature control system to keep the comfortable temperature stable 4. Highly elastic and flexible fabric, greatly enhance the fit and comfort 5. Visual digital display, easy to operate 6. Built-in lithium battery, wireless design, relax anytime, anywhere 7. Magnetic suction controller, the knee pad can be washed after removal Parameters. 1. Hot compress temperature: high temperature 60 degrees, medium temperature 55 degrees, low temperature 45 degrees 2. Voltage power: 3.7V-2A-7.5W 3. Battery capacity: 2500 mAh 4. Charging voltage: type-c 5V-2A 5. Charging time: 2H 6. Use time: 6-12 times 7. Rated time: 15 minutes time 8. Weight: main body net weight 140g, controller weight: 82g 9. Product size: the upper leg of the body circumference 50cm, the lower leg circumference 42, the main body length 30cm 10. Controller size: diameter 7cm thick 2.3cm