Electric Heating Knee Massager Infrared Heating Knee Pads Air Pressure& Vibration Physiotherapy Instrument LCD Display Joint Pain Relief 3 Heating Levels Features: 1.The massager has fully enveloping airbags (inner side and straps)to squeeze, cyclically inflate and deflate, allowing knees to enjoy air pressure relaxing massage; 2.There are built-in 20piecesred light physiotherapy lamp beads, specific wavelength far red inner and outer bands penetrate into the knee, to relieve knee fatigue anddiscomfort; 3.Through vibration, the device can repair and massage the muscles of the knee area to relieve the pressure and let it fully relax; Three heating modes: low range: 453 (relieving knee tingling), medium range: 503 (releasing knee tingling), high grade: 55 3(Relieve walking pain). 4.Intelligent timing design:you are free to choose 15 minutes/20 minutes/25 minutes/30 minutes. 5.One-key start, large screen display, wireless use, simple touch interface, can also be used by the elderly; 6.It is USB chargeable, with a built-in 2000mah lithium battery, it usually gets fully charged inthreehours (related to the power of the charging plug), the normal use time is five to six hours(different depending on the use mode). Specifications: Material: ABS Color: black+white Size: 20.5*15.5*17.5cm Rated power: 5W Rated voltage: DC 5V Timing set: 15/20/25/30minutes Heating temp: low 453, medium 503, high 553 Battery: 2000mAh Packing list: 1* Unit 1* USB Type-C Charger Cord 1* User Manual