Siren 3 Main DeviceDesigned with small to medium boats in mind, the Siren 3 offers immense value at an affordable price. Together with the Siren Connected Boat Mobile App, our Smart Boat Monitoring System puts your boat in the palm of your hand 24/7.Install the Siren 3 on your boat to monitor and track multiple critical systems such as battery levels, bilge pump activity, engine performance, temperature, location, and more, all right on the App*.Features: Advanced features include Global 4G/5G LTE-M Connectivity, built-in NMEA 2000, and Yamaha Command Link connectivity *Some monitoring capabilities require a Siren 3 Series Wireless Sensor (now 25% off for a limited time only) *Supports up to 6 wireless sensor pairings and 1 wired sensor Battery Monitoring - Monitor your boat&&';;s battery & receive alerts if voltage is low GPS Position/Geofence - Track boat&&';;s location & receive alerts on boat movement NMEA 2000 - Best-in-class NMEA 2000 marine electronics backbone connectivity LTE-M (4G/5G) - The latest cellular technology connects you to your boat *Based on 4G/5G LTE-M availability Features with Add-On Sensors & Accessories: Engine Metrics - Monitor performance & support metrics for any NMEA propulsion system Connected Fluid Tanks - Monitor tank levels (i.e., fuel, water, etc.) and check level history Security/Entry - Add snap, motion & entry sensors for the ultimate boat security system Bilge - Monitor bilge activity, including bilge run time & daily bilge cycles High Water - Detect water and monitor water level in the bilge Temperature - Monitor temperature of cabin, engine room, fridge, and/or bait locker Wireless Sensors 3.0 - Siren 3 delivers improved wireless connectivity Your Boat at Your FingertipsMonitor vessel&';s vitals, including its bilge pump activity, battery voltage, temperature, and presence of water and get instant alerts if anything goes wrong.TrackTrack your boat&';s locations, set geofences, and be notified if it moves or enters unauthorized areas.ControlTurn a relay on and off, such as your remote battery switchMaintainTrack and record maintenance, pull maintenance history reports, and view engine hours with applicable Yamaha outboards.