Mr. Heater F273400 Buddy Portable LP Gas Heater Features include a tip that helps to switch over when it gets knocked over due to low oxygen sensor Runs up to 5 hours on a one pound cylinder Approved and factory tested with a one year warranty Use with 1- or 20-pound cylinders; optional hose assembly and fuel filter sold separately Never bring a 20-pound cylinder indoors; limited 1-year warranty