This is the reusable gel heating pad that adheres directly to the specific area you wish to treat, delivering therapeutic warmth without bulky belts and fasteners. The low-voltage device combines a patented aerospace-grade carbon fiber fabric covered with a non-toxic, non-irritating reusable gel. Unlike lesser units that only warm the surface of the skin, this pad emits far infrared heat that penetrates deep into tissue to loosen stiff joints and muscles and boosts circulation to help relieve pain and promote healing. A tethered controller sets the heat to one of three levels from 108º F to 118º F and automatically shuts off after 30 minutes to prevent over-treatment. The thin, flexible pad adheres comfortably on the lower back, shoulder, knee, abdomen, or wrist and lasts for 50-100 treatments, making it an economical alternative to disposable single-use heating pads. Powered by a 6' long USB AC/DC adapter. Includes string pouch. 6 1/2" L x 3" W x 1/8" D. (1 oz.)