Blue Sea Systems M2 Dc VoltmeterModel: 1833-BSSFeatures:Auto-dimming, bright OLED display is easy to readEasy to adjust80dB alarm on all modelsIsolated MOSFET relayMonitors DC Voltage on large, bright display. Accurately measures and monitors the voltage of up to four battery banks.SpecificationsFunction8 to 70VResolution0.01V DCInput Voltage7-70V DCAlarmsHigh/Low VoltageCurrent Accuracy 1.0%Display Size55mm x 28mmMaximum Power Consumption1.00 WattMinimum Power Consumption0.3 WattWeight4.00lb (1.81 kg)What’s in the Box:M2 DC Voltage Head UnitSurface Mount Bezel and SealSurface Mount GasketSurface Mount CoverFlat Mount BezelFlat Mount ClampMounting RingMounting NutConnectorsScrewdriver Retail Package Only