The OLAS Guardian is a wireless engine kill switch that acts within two seconds of a person falling overboard. It has the dual function of also acting as an instant, Man Overboard Alarm system. The Guardian simply connects with up to 25 OLAS transmitters and can cover a vessel up to 50ft. In The Box: Guardian, OLAS Tag + Battery, Power Connection wires, Kill cord connection wires, Stainless steel switch, User Guide, 5 x marine connectors. The OLAS Guardian ensures that powerboat and RIB drivers can stop their boats instantly if the skipper or crew gets separated, preventing accidents from unmanned, uncontrolled vessels. They are free to move around their boat without constantly having to remember to attach, detach, and re-attach a physically wired kill cord. Customizable Tag Modes Engine stop - it acts as a kill cord, stopping the vessel when the tag is out of range, without triggering MOB alerts MOB alert - it alerts the vessel without cutting the engine Engine stop + MOB alert - this mode triggers crew alerts and cuts off the engine How it works: Up to 25 OLAS transmitting devices (OLAS T2/ OLAS Tag/ OLAS Float-On) within range can be tracked around the vessel by the Guardian. This allows freedom for the crew and skipper to move around the vessel with confidence that if anyone falls overboard, either the engine will be cut off and/or an alarm will occur, and a swift recovery can be actioned. The Guardian connects to a vessel's 12/24v power supply and existing kill switch using the supplied connectors, making it quick and easy to install with immediate usability. A 21mm hole is required near the existing kill switch for the 20mm stainless steel, LED control switch to be installed. (Professional installation is not required but is advised,Man Overboard (MOB) Alarm System | Instant Reaction TimeWireless Engine Kill Switch | 2-Second Response TimeConnect with up to 25 OLAS Transmitters | Covers vessels up to 50 ftConnects to boat's 12/24 V power supply and existing kill switch via supplied connection cablesIn The Box: Guardian, OLAS Tag + Battery, Power Connection wires, Kill cord connection wires, Stainless steel switch, User Guide, 5 x marine connectors.