Switch power supply convert AC 110V/220V to DC 12V 30A 360W: The default input voltage is 110V, Output voltage is adjustable 10% , Metal case with many holes makes heat dissipation more efficient. AC 110V/220V Input Voltage: We have already adjusted the switcher to 110V/115V for our US customers, if you want to use AC220V,don't forget to adjust the switch to the 220V side before use.AC 110V/220V.Wide voltage input adjusted automatically to SMPS Model (12V 1A-5A, 12W-60W). As for Model (12V 10A-60A 120W-600W), there is a voltage selector switch located on the side of the switcher is used to set the input voltage to the power supply to either 110V/115V or 220V/230V. High Efficiency and Reliability: Smart device surge protection for Short-circuit Protection, Overload Protection, Over Voltage, Over Temperature Protection. Low Temperature Rise.Voltage consistency:There is no voltage fluctuations to speak of at power on, during transmit, receive, or at power off.Built-in EMI f