Desa Tech 406012 is a portable 30,000 BTU heater designed to provide warmth for construction sites, winter workshops, and animal stables. It operates on kerosene or No. 1 fuel oil with a grounded electrical power outlet (120 volts, 60 cycles, 2.35 amps). Safety features include a reset button and safety controls that cut off all power to the heater in the event of a malfunction. The heater also has a thermostat (sold separately and available at Sears stores) that allows users to set a desired temperature and have the heater automatically cycle on and off to maintain that temperature.