Maretron Monoxide Detector f/SIM100-01 Carbon. Attaches to Maretron SIM100 for NMEA 2000 network monitoring Real Test technology allows for functional testing in the field Trouble relay for circuit trouble or detector end of life notification Provides wiring supervision 4-wire detector; mounts to wall or ceiling Specifications for Maretron Carbon Monoxide Detector f/SIM100-01: Manufacturer: Maretron Color: Black Package Contents: Maretron Carbon Monoxide Detector f/SIM100-01 Maretron CO-CO1224T: Monoxide Detector f/SIM100-01 Carbon