This battery-powered heated body wrap produces safe, deep penetrating infrared heat to alleviate sore muscles and joints without being tethered to a wall outlet. Unlike typical heating pads that merely treat just below the skin's surface, infrared heat penetrates deep into tissue and increases subcutaneous temperature by up to 2º F to to stimulate blood circulation, relieve swelling, and improve the mobility of tendons and ligaments. Made from neoprene and nylon, the flexible pad wraps comfortably around the body and allows freedom of movement. With three heat settings between 113º F and 140º F and an automatic shut-off after 60 minutes. Fits up to 52" waists. Requires four AA batteries or it can be powered by the included AC, DC, and USB adapters. 19 1/2" L x 6 1/2" H. (1 lb.)