This is the mitten-like device with deep-penetrating infrared and red LEDs that relieves pain and stiffness in the hands. Utilizing technology originally developed by NASA, the 40 medical-grade LEDs that line its interior—20 infrared and 20 red—provide hand pain relief for those with arthritis, tendonitis, sprains, and strains with 880nm invisible light and 660nm visible light that penetrates beneath the skin to increase blood circulation, reduce swelling, and temporarily relieve joint pain. A study at Children’s Hospital of Wisconsin in Milwaukee showed the LED technology reduced painful inflammation by up to 37%. Treats one hand at a time. Battery charges via USB. 10" L x 7" W x 1/2" D. (12 oz.)