Option Panel only:

includes aluminum panel with aluminium backer only 

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Option Panel with switches and lights

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Option complete panel:

includes the panel with the nescessary switches and lights, with firehandles

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Option complete panel with interface

includes the panel with the nescessary switches and lights, with firehandles and a tempest usb interface

 

The fire supression panel comes with a very strong aluminium backer - the light plate is located on this backer. In conjunction with the fire box you get a very solid unit.

The Tempest USB technology alows interfacing with Project Magents - no programming is required - all PM functions are supported. All annunciators work, the warning lights in the fire handles work. To use them they need to be pulled as in real aircraft before turning.