FAST HEATING KNEE BRACE: heats in seconds, provides ultra comfy Far Infrared therapy for knee arthritis pain relief and relief recovery, keeps knee warm, can also be used on calf, thighs, arms to relieve muscle soreness and cramps. 
★ RECHARGEABLE & WIRELESS: One of the greatest things about this knee brace massager is its portable nature. Bulit in 2300MA rechargeable battery, you can enjoy a rejuvenating massage even on the go with our knee massager.