The Mr. Heater Portable Buddy Radiant Liquid Propane Heater connects directly to a 1 lb. cylinder and is the perfect solution for heating enclosed spaces like large tents up to 225 sq. ft. The expertly engineered size to BTU ratio is augmented with a fold down handle to give the heater maximum output while retaining a minimalistic footprint. The swivel regulator gives you the ability to adapt usage from a disposable cylinder to a remote gas supply with the purchase of a hose and filter (not included). To light the unit, simply rotate the knob to pilot and push. Then the integrated Piezo sparking mechanism will take care of the rest. With the Oxygen Depletion Sensor (ODS) and accidental tip-over safety shut-off you can be sure that you will enjoy years of comfortable indoor safe heat. The use of un-authorized accessories or attachments with this heater are expressly prohibited, may cause serious injury, and will void the warranty.