Blue Sea 1830 M2 DC SoC State of Charge Monitor [1830]M2 DC SoC State of Charge Monitor Accurately measure and monitor the state of charge of your batteries. Supports programmable shunt ratios. Features: Auto dimming, bright OLED display is easy to read Easy to adjust 92dB alarm on all models Isolated MOSFET relay Specifications: Meter: Current Voltage Function: 8 to 70V to 5000A (500A with included shunt) Alarms: High Current, High Low Voltage, Low Battery Display Size: 55mm x 28mm Input Voltage: 7 70V