Mr.Heater portable buddy heater 4000 to 9000 btu FEATURES-4,000 or 9,000BTU per hour-For use with propane gas-Heats up to 200 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 & filter-14.25"L x 9"W x 15"H*THE USE OF UN-AUTHORIZED ACCESSORIES/ATTACHMENTS WITH THIS HEATER ARE EXPRESSLY PROHIBITED, MAY CAUSE SERIOUS INJURY, AND WILL VOID THE WARRANTY Other Features: 4,000 to 9,000 btu, swivel regulator & single control, fold down handle, hi-low heat settings, low oxygen safety safety shut off system (ods) tip over safety shut off, heat up to 225 sq ft, runs off 1 lb cylinder, also can connect to 20lb tank, runs approx.5.4 hours on 1 lb cylinder low set