The patented heavy-duty black powder coated steel offset infrared patio heater introduces a new revolution in outdoor heating. Operating at 90% heating efficiency, this infrared patio heater runs on regular household electric current and is substantially less expensive to operate than propane patio heaters. This adaptable unit can be used indoors and outdoors and has wheels for easy mobility. Warning: this product can expose you to chemicals including di(2-ethylhexyl)phthlate (dehp) which is known to the state of california to cause cancer and birth defects or other reproductive harm. For more information go to www.P65warnings.Ca.Gov.