. The FR Series Fire Detection System 1 Zone Monitor adds extra safety to your boat by monitoring conditionsbeforea fire occurs. The easy-to-install and operate waterproof display monitor features colored LEDs for a continuous view of a fire condition. Display monitor indicatespower on,okay,fault, orfire. Membrane style push buttons for silence, reset, and test functions.The system includes an 85 dB audible horn. Install any combination of smoke detectors and or heat detectors; up to 14 may be installed per zone with a 12 VDC System or up to 8 per zone in a 24VDC system (sold separately). Designed for cruisers and boats with accommodation areas. Recommended smoke detector installation is in all sleeping accommodations, galley, salon, and engine room. Heat detectors may be installed in an engine room, generator room, or inside cabin areas. Installation requires drilling a 2 1/8” hole and wiring to the detectors.