Infrared technology heats up the person or object rather than the air. Energy efficient operation coverts nearly all energy into heat. Carbon fiber glass enclosed tube heats up quickly and evenly. Moisture resistant for operation in or covered outdoors (do not expose directly to rain or water). Adjustable thermostat levels for optimum indoor and outdoor comfort and automatic overheating shut-off. No fuels or oxygen required like gas or fan driven heaters, resulting in safe, quiet and odorless operation. High quality and durable aluminum housing. Mount to wall or ceiling with included adjustable hanging brackets. 8-ft grounded cord.