4,000 or 9,000 BTU per hour/ For use with propane gas/Heats up to 225 sq. ft. Single control start knob/ Hi-Low heat settings / Swivel regulator Fold down handle / Accidental tip-over safety shut-off/ Includes Piezo igniter Runs off a 1 lb. cylinder/ Connects directly to a 20 lb. cylinder with optional hose and filter THE USE OF UN-AUTHORIZED ACCESSORIES/ATTACHMENTS WITH THIS HEATER ARE EXPRESSLY PROHIBITED, MAY CAUSE SERIOUS INJURY, AND WILL VOID THE WARRANTY.