The indoor safe, 11,000 BTU high performance, omni-directional mesh burner provides high intensity radiant heat in a full 180 Degree spread so everyone can enjoy the warmth! With integrated gas powered accessory controls and a quick connect accessory rail system, you're safe and ready to go in any weather conditions and any event! Mr. Heater's trusted - advanced safety detection systems, including; emergency low oxygen safety system, apex 50 Degree tip-switch and thermal shut-down system, you and your family are safe. You asked and we listened! Left and right side accessory doors feature battery compartment and gas accessory quick connect port. Opposite door includes multi-purpose storage compartment for gloves, documents, power cords or fishing tackle box.