The Char-Broil TRU M580 IR is so named because it features Char-Broil"s patented and award winning TRU Infrared cooking system and 580 square inches of primary cooking area. The TRU Infrared cooking system completely eliminates flare up and its design allows for perhaps the greatest grilling versatility seen in years. Each burner has its own temperature gauge located above the control knob and working at grate level for a true reading of the heat about to sear you steak or whatever you may be grilling. The TRU Infrared design also allows you to add wood chips directly on to the cooking grates for added flavor and no flare up. This four-burner grill is highly efficient due to the unique patented Infrared grates and thus needs just three burners and 42,000 BTU"s to get the job done. The M580 TRU Infrared and its 580 square inches of primary cooking area, 200 square inches of secondary cooking area provide more than enough space for most any gathering. The new "Surefire" electronic ignition, flush mounted side burner, and a combination of stainless steel and painted steel appliance style cart construction, further separate this grill as a unique value to the marketplace. The TRU M500 IR is also a Dual Fuel designed grill for easy conversion to Natural Gas with the purchase of the conversion kit on Amazon.com