60,000 BTU Battery Powered Propane (LP) Forced Air Heater with sturdy construction and easy lift carrying handle. Up to 9.5 hours of heat on battery power or can be operated on electric. Certified for use with DeWalt 20V or Milwaukee M18 Rechargeable battery packs (not included). Low - 36,000 Btu's / High - 60,000 Btu's. Features include: Electronic spark ignition, overheat auto shut-off, safety lockout mechanism to prevent accidental gas leaks, wind resistant and rain protected . This portable & stable design is ideal for areas when electricity is not available, such as construction sites or remodeling jobs.