X-RGB2+ power supply?

[sigmaris]

Can anybody tell me what type of DC power input is needed on the X-RGB2plus? I have a box here I'd like to use, but I don't know the voltage or current required to operate it. I don't have the manual or the original power supply either 

[NeWmAn]

DC 12v 1A -   Plug measurements: external =5.5mm, internal =2.5mm (Internal = Positive)