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Ademco SA4142AD Replacement Motherboard..
This used Ademco 4142 motherboard works and has been tested. It has been defaulted to the original manufacturers settings.
The sale includes the 4142, battery leads and 2k resistors.
HONEYWELL ADEMCO 6139 R FIRE ALARM ANNUNCIATOR SECURITY BURGLAR KEYPAD RED
Ademco 529 Fire Alarm Pull Station