This propane heater has a built-in rechargeable battery which runs up to 8 hours per charge. Recharges in 5 hours and can be operated while charging. Will run up to 12 hours on a 20 lb. tank. Heats up to 800 sq. ft. 50% quieter than a standard heater. Comes with a 10' hose with regulator. Piezo ignition. Flame safety shutoff and high temperature limit switch. 35,000 BTU per hour. Approximate weight: 12 lb.