GRINNELL AUTOCALL SIMPLEX MAIN PROCESSOR BOARD FOR TFX-800 SYSTEM MODEL MP 940500 FIRE ALARM.. THE NETWORK INTERFACE MOD AS YOU SEE IN SEPARATE PICTURE COMES WITH IT. IT IS JUST NOT CONNECTED SO YOUR AGAIN MY LOSS ON ENJOY THE NICE DISCOUNTED PRICE.. :>)  This came out of a working system that was fully functional a 100% the system was upgraded to newer system. I have a large number of All autocall/grinnel equipment available! Plus you get free Expedited Shipping but if you want different then it's extra. Please checkout my other other ebays on the Grinnell/Simplex Fire Protection System. This is priced to sell with plus free shipping.