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. - cis2:mm5mnJlm -Specifications: Sensor Quantity - Max: 6; Box Dimensions: 3"H x 6"W x 9"L WT: 1.7 lbs; UPC: 857331007938; Brochure (pdf)