8 Hardwire/Wireless Zones on board, 600 event log. 3 on-board outputs, up to16 external relay outputs (RM3008s), Up to 4 areas. Up to 2 NAPCO helically-filtered, crystal-control RF receivers,Up to 64 user codes, Interior bypass group with programmable automatic interior bypass, Up to 64 zones with multiplex expansion including 2 two 2-wire fire zones(built-in), With multiplexing, can accommodate up to 64 EOL zones (from custom alpha keypads or multiplex modules), EZ Programming2 More comprehensive, menu-driven programming for all zones plus test timeren