Variable BTUS - 8, 12 and 15,000 BTU/HR. Adjustable Heat Control - Hi, Med, Lo regulator. Safe - Heater shuts off automatically with loss of flame. Ready To Use. For Outdoor Use Only. Operating time on a 20lb tank = 30-52 hours Variable BTU'S - 8, 12 and 14,000 BTU/HR Adjustable Heat Control - Hi, Med, Lo regulator Safe - Heater shuts off automatically with loss of flame Ready To Use - Operates on a 1 lb disposable propane cylinder (not included) For Outdoor Use Only