AD series 155W 1-2 groups output with 5V, 3A DC-DC conversion with external shell single output Mean Well switch power supply, this power supply has global universal full range AC input voltage, high power factor, short circuit protection/overload protection/overvoltage protection, battery low voltage and battery polarity protection, natural cooling, 134KHz fixed switching frequency, international safety certification, 100% full load aging test, 2 years warranty and other features