Programmable Digital Thermostat for indoor fireplaces. Single stage heating & cooling or heat only. Battery powered for maximum compatibility. Dry contact allows millivolt and 24v use. Two programs: one for weekdays and one for weekends. Each program has up to four separate time/temperature settings. Temperature range from 45 degrees to 90 degrees F. Includes 25' of thermostat wire and connectors to mount on any millivolt valve. Shipping is free, however we ship only within the continental United States.