Heats an extended 400 sq. foot area.Radiates heat from center cylinder.Efficient 40,000 BTUOutput heats up to 10 hour continuous run time.Adjustable heat settings.Oxygen Depletion Sensor extinguishing pilot and flame before oxygen falls to un safe levels.Protective screen prevents contact with heat cylinder.No tools required.Quick start push button electronic ignitor.Wheels for easy moving.Disassembles in minutes for easy storageComes fully assembledSafe for all outdoorLoading quantity:170pcs/40HQ