The Ozark Trail Flare 360�� Propane Portable Indoor/Outdoor Heater, Green provides 275 sq. ft of heat all-around for your patio get-together or camping weekend. Share stories in the cooler months outdoors thanks to the heater��s 11,000 total BTUs. When used indoors, a low-oxygen shutoff sensor turns the propane gas off if there��s not enough oxygen in the room. A tip-over safety switch will also turn off the heater if it��s knocked over. This heater uses a 16 oz./1 lbs. propane tank (not included). Heater has a 360�� heat radius of 275 sq. ft. for your patio or campsite Surround yourself in 8,000-11,000 BTUs of heat for colder nights Enjoy heat for up to 2 hrs. on high setting, 3 hrs. on low setting Runs on a 16 oz./1 lbs. propane tank (not included) Portable heater for indoor and outdoor use (as well as emergency indoor heating) Tip-over safety switch shuts off propane heater if unit is knocked over Low-oxygen shutoff sensor turns off gas if oxygen levels around you fall too low 11.02 in. L x 11.02 in. W x 11.60 in. H, 7.80 lbs Heater uses a quick-start electronic ignition