20,000 BTU dual-stacked burner delivers faster boiling and low simmering for greater cooking flexibility. Close Two levels of flames. Making saucess is easier than ever. The dual-stacked center burner features two levels of flame. Bring sauces to boil quickly with both levels of flame and then finish at a low simmer using only one level of flame. OptiSim(R) Burner: the wide & thick burner design diffuses heat evenly and reduces hot spots — perfect for simmering delicate sauces or melting chocolate. Close OptiSim Burner for precise simmering Wider and thicker OptiSim burner design diffuses heat evenly for better flame control when simmering delicate sauces. Electronic Re-Ignition Will Automatically Re-ignite the Burner in Case the Flame Goes Out Close Automatic re-ignition The electronic re-ignition feature will automatically re-ignite the burner in case the flame goes out during use. Continuous Cast Iron Grates: makes it easy to slide pots & pans from burner to burner. Distinctive Red LED Light Indicates Burners Are On Close LED indicator light safety feature A burner indicator light on the cooktop illuminates when at least one burner is on.