"WAECO CoolPower M50UThe voltage monitor protects the vehicle battery from overdischarge.
When the battery voltage drops below 11.6 V, the voltage monitors interrupts the power supply of the connected load.
When the battery voltage rises above 12.8 V, the connected device is supplied with power again.
Status display with LEDsSuitable for connection to the cigarette lighter socketAlways the right battery voltage: voltage monitor integrated in the power cableEnables automatic shutdown at low battery voltage and switching voltage at normal"