Whether you're camping, tailgating or working at the job site, the Mr. Heater(R) 540 Tank Top Heater is your missing link. Designed to safely and economically heat an outdoor area, this heater boasts a swivel head for multi-directional heating and an easy ignition switch. Mr. Heater(R) keeps you safe with a standard auto-shut off switch if the lamp tips over. Durable and lightweight for traveling, the Tank Top keeps you warm all season. FEATURES: Great for use at home, on the job or at the campsite Useful on ice fishing trips or at sporting events Designed for outdoor use only Boasts an excellent source of economical heat Lightweight design for easy portability Propane powered via a 20 lb. cylinder Will not deplete oxygen levels Adjustable 360(R) burner head swivels 180deg for directional heating Swivel head is easy to adjust for warmth where you need it most Push-button TE valve allows easy ignition Piezo ignition switch Auto shut-off switch engages if lamp tips over Standard tip-over feature assures safety Durable, stainless steel construction Manufacturer's limited one-year warranty SPECS: Powered by liquid propane Uses .176 lbs. per hour (using 20 lb. tank) Power: 30,000 BTUs (low), 36,000 BTUs (medium), 45,000 (high) Run time: 9.6 hours (minimum setting), 5.6 hours (maximum setting) Weight: 5.5 lbs. Dimensions: 11.6" L x 22.6" W x 16.8" H