• 40' x 50' coverage
• Built-in Remote Point Module with DIP switch addressing (4278EX) or serial number addressing (4278EX-SN)
• Alternate Polarity Quad processing for improved false alarm immunity
• Horizontal adjustment for flexibility
• Long range mirror included
• Extremely low current
• Tamper
• 6 year over-the-counter warranty

It makes sense to use ADEMCO's smart motion detectors for multiplex systems. Not only are they smarter than ever, but they provide the opportunity to reduce your overall installation costs! Whether it's a commercial or residential installation, these sensors offer you the following benefits:
• Point ID identifies the exact location of the intruder with either a DIP Switch Address (4278EX) or a Serial Number Address as distinctive as fingerprint (4278EX-SN). And with the built-in Remote Point Module, the cost is less than a separate module and sensor.
• ADEMCO's patented Global Polling technology senses alarms up to 8 times faster than conventional multiplex.

ADEMCO's unique 2-wire multiplex reduces installation costs over conventional 4-wire hardwire and multiplex approaches:
-- Wire cost is reduced and less than half the number of connections are necessary
-- No more need to home run wiring
-- Each sensor draws super low current, reducing power & battery requirements on large installations while allowing for longer wire runs or smaller gauge wire