Smartgauge™ Battery Monitor - 12/24VThe Smartgauge™ Battery Monitor provides highly accurate monitoring at a similar cost of standard ampere hour counting monitors. The easy-to-understand display, dependable State-of-Charge Percent (SoC%) reading and its ease-of-use mean that even the most technically challenged crew member can understand just how much power is left in the battery. Smartgauge™ is changing how sailors and power boaters think about battery monitors.Features:An Advanced Battery Fuel GaugeMonitors State-of-Charge Percentage (SoC%) and Voltage of the Primary BatteryMonitors Voltage of a Second BatteryNo Shunt RequiredSelf-CalibratingAccurate within 5% after just a Few CyclesHigh/Low Voltage and SoC% AlarmsAlarm Contacts for Auto Start/Stop