Knee Physiotherapy Device Rechargeable And Heated Knee Massager To Keep Warm Old Cold Legs, Middle-aged And Elderly Leg Pain Device $ 92.18 Product information: Size: M Rated voltage: 5V Power: 5V Body care parts: knee pads Product function: knee physiotherapy device Controller gear: three gears Color Classification: Kneepad Massager [Upgrade Massage Hot Compression] 5000mAh long-lasting battery lifeThree-speed hot compress Three-speed vibration