Blue Sea Systems Vessel Systems Monitor 422 1800 Vessel Systems Monitor 422 Three intuitive display modes Flexible case design offers three mounting options Fully programmable legends and adjustable alarm functions can be customized to fit every boat Included in retail packaging head unit, surface mount bezel, surface mount gasket, DC Current Shunt 8255, AC Current Transformer 8256, Battery Temperature Sensor 1820, connectors, and mounting screws Monitors DC systems voltage, amperage, battery state of charge - amp hours remaining, time remaining, % charge, battery temperature (alarms for all values) Monitors AC systems voltage, amperage, watts, frequency (alarms for voltage, amperage, and frequency) Monitors tank levels fuel, water, waste, (alarms for high level waste, low level fuel, and water) Monitors bilge active, cycle count, volume, duration (alarms for cycles, volume, duration) DC Current Shunt AC Current Transformer Battery Temperature Sensor