Reversing Relay for I3 Smoke Detectors with Sounders

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Price: $31.95
Part #: RSS-MOD
Manufacturer: System Sensor
Mfr Part #: RSSMOD
The RRS-MOD is a reversing relay/synchronization module for use with i3 Series detectors with built-in sounder.
Need one per every zone you have 2 wire smoke detectors.