Blue Sea 1839 M2 OLED Tank Monitor Buoys It allows you to use

It allows you to use features such as Down Sounder

Fuse sold separately

Cooling: vario fan

RT Fuse Block - 8 Circuit with Cover

Blown fuse LED indication for each output circuit provides a clear indication of faulty circuits and eases troubleshooting issues remotely

Blue Sea 1839 M2 OLED Tank Monitor Buoys It allows you to useM2 OLED Tank Monitor The M2 Organic LED Digital Monitor measures essential electrical system parameters with adjustable alarms and an auto dimming display. The M2 Monitors include a MOSFET External Circuit Relay (ECR) which can be used to control external circuits based on any value measured by the M2. Features: Auto dimming, bright Organic LED display is easy to read 80dB alarm on all models Isolated 500mA MOSFET relay Includes external DC Shunt or