PAC BG-12, Battery Guard 12 Volt

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Microprocessor that constantly monitors the voltage available LED changes color with state of battery: green at 12.4v or higher, yellow below 12.4v, red at 11.5v or lower Below 11. 6v, the monitor turns off the vehicle's sound system Progressively resets as the battery recharges, turning the head unit back on at 12.4v Accurate to within 0.1v DC Connects to the dash lamps to dim the LED at night Show more