About this item [12V Power Supply 20A]: Input AC 110V/220V 50-60Hz, Output DC 12 Volt 20amp Max, voltage can be adjust 10%, 2 Channels input and output [Silent Running]: Fan less design with less noise while working; Honeycomb design for better heat sink, offers you a better using experience [Safety Using]: Built in fuse providing a voltage regulated single output which can be adjusted with an on board potentiometer. With short circuit / overload / over voltage protection function to protect your device [Widely Application]: Great for LED Strips, 3D Printer, ham radio transceiver, CCTV cameras ，car subwoofer amp, audio amplifier, wireless router, ADSL Cats, HUB, audio/ video power supply etc. ( You will receive the brand or non brand package by random