FNIRSI DPS-150 DC Power Supply Variable, 30V 5A Adjustable DC CNC Power Supply with 4-Digit IPS

So, Amazon will send you a used device for the price of a new unit and FNIRSI will lose the package in customs somehow without it leaving their facility. IF you want one of these get it from Ali, at least you will be able to track it properly, receive it and it will be in a sealed box.

can you tell me what size barrel connector to use for DC input?