1st Mate Marine Safety and Security System for Mercury SmartCraft Engines is compatible with Mercury SmartCraft engines 40hp and higher manufactured since 2005. System kit includes vessel hub, wire harness, antenna, NFC tag and installation instructions along with captain's fob, wristband and carabiner clip. Passenger wearable fob kits are available separately. Requires 1st Mate mobile app. 1st Mate Marine Safety and Security System utilizes wearable fobs for boat captain and up to seven passengers. These wearables connect to a mobile device and ensure that if the captain falls overboard, the engine(s) will stop, an alarm will sound and alerts will be sent via the 1st Mate mobile app, thanks to direct integration with the vessel's propulsion system. Similarly, if a passenger falls overboard, the captain will be alerted and given the passenger's GPS location via the app. Engine(s) stop when fob is submerged in waterSetting that users can configure that turns off alerts if engine(s) is in neutralOver the air updatesAudible alarm from boat hub and mobile device appLocation marked via GPS on app and vessel multifunction displays (if equipped)Alerts sent to mobile app and wearables of connected passenger(s)Instructions provided on mobile app of connected passenger(s) on how to return to location where captain went overboard Engine Systems Include: App, Hub, Harness, Captain FOB, Captain Wristband, Captain Carabiner Clip Wearable Fob Kits Include: FOB, Wristband, Carabiner Clip NOTE: 1st Mate is not a replacement for safety lanyards or personal floatation devices.