Blue Sea 1839 M2 OLED Tank Monitor Buoys the simple one-handed operation allows

the simple one-handed operation allows you to easily dock your phone and instantly start charging

The opening in the ring allows for a cup with a handle to

Fuse sold separately

It allows you to use features such as Down Sounder

Blue Sea 1839 M2 OLED Tank Monitor Buoys the simple one-handed operation allowsM2 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