The Chattanooga Theratherm Digital Moist Heating Pad delivers intense, moist heat therapy which provides temporary relief from pain associated with arthritis, muscle spasm and inflammation caused by strain and tension; intended for use on the back, shoulder, wrist, stomach, knee or foot. Included is a flannel covering which draws moisture from the air and as the heating pad temperature rises, the moisture is released onto the skin. It features an easy-to-use digital hand control that allows you to program and monitor the temperature and treatment time. Control the temperature between 88 and 166 degrees Fahrenheit (31 and 74 degrees Celsius) and select the duration between 1 and 60 minutes. A lockout mode protects against inconsistent changing of the control settings throughout treatment. UL and cUL classified.