Duraflame Quartz Infrared Portable Heater, TS1500-BLK Uses 6 infrared quartz heating elements Heat exchanger: copper alloy; uses standard 120v, 3 prong ground outlet; heat output: 5,200 btu rated power: 1,500 watts, 12.5 amps Infrared heating elements lifetime is over 20k hours Traditional design features: -subtle bow front contour face -dupont-style shaped tabletop edges Concealed furniture quality casters roll in any direction