Hi/Lo Model, 73"x 8" Interlink Linear 304 SS, 150k BTU, 24VAC, Fully Assembled Hot Surface Ignition Fire Pit Insert. Includes 73" x 8", 18 Gauge SS Pan, 1.5" sidewalls, 72" Stainless Steel Linear Burner with HPC's Innovative Raised Hub Technology for water prevention; 16 Gauge SS Valve Control Box; Hot Surface Ignition; Built and tested in USA, arrives fully assembled.Electronic Ignition (EI Series HI/LO Model) - Hot Surface IgnitionHI/LO Model, Remote Included, to adjust flame, 45% turndown. This is our top-of-the-line system featuring the ignition ease with use of a wall switch or handheld remote to control flame as well as auto-relight if flame loss. This is our most advanced control system with numerous convenience and performance improvements for both On/Off Models and our newly introduced High/Low Models- such as High/Low flame control via our new remote or smart phone app, a redesigned hot surface ignitor and many other improvements. How It Works Start Up: This is done by use of a wall switch or remote control (or smart phone on Hi/Lo Models. When the ON command is received, the system completes initial safety checks then starts flow of pilot gas. After 5 seconds the hot surface igniter glows igniting pilot flame. When the system confirms pilot flame present, the main burner gas will flow ignited by the pilot flame.Operation: While enjoying the ambiance of your fire pit, the system is at work monitoring flame status, internal temperatures / voltages and other safety parameters. If flame loss does occur, the system will turn off all gas flow, and then restart by automatically commencing Start sequence. High / Low Flame Control Models: This option includes a remote control and smart phone app with 2-way communication with the fire pit. Remote allows flame height control while receiving information from fire pit to advise user of fire pit status (flashing LED). Shut Down: To turn OFF the fire pit simply use wall switch, remote control or smart phone.