The Dyna-Glo HeatAround 360 is the only portable recreational heater that provides 360 degrees of warmth. It's compact, versatile 360 design makes it the ideal choice for grab and go heat. The oxygen depletion sensor allows safe indoor use, for emergency heating. No electricity and no batteries are required, as it is filed by a 1 ls.b propane tank (not included). It can also be connected to a 20 lbs. propane tank for outdoor use, with an optional hose/regulator (not included). The HeatAround 360 ships completely assembled, and it includes a swivel regulator to easily attach a propane tank. The piezo ignition lights quickly and easily, it heats up to 250 sq. ft., and it is adjustable from 7,500 BTUs to 10,000 BTUs. It also includes a safety tip-over shutoff switch, just in case. The Dyna-Glo HeatAround 360 is an outstanding solution for grab-and-go portable heating, tailgating, hunting, camping, fishing, emergency indoor heating, backyard/patio heating, and many other uses.