CDJ-2000 and DJM-900NS-M voltage issue

It is my understanding that some CDJ-2000 and DJM-900NXS models are multi-voltage even though the information stamped on the equipment states that it operates on 120v only.

Please help me by confirming if the equipment I have has the multi-voltage quality:

• DJM-900NXS-M model number UXJCB
• CDJ-2000: for this pair of units I don't have the model number because I don't have the original boxes, is there any way to know the model number without the box? I have checked the players everywhere and can't find the information stamped on the equipment. One of the serial numbers is JGMP005143UC. The serial number sticker on the other player is broken so I have no way of knowing which one it is.

Is there any way to confirm the multi voltage quality by opening the unit and checking the power supply inside?

I will look forward to your comments.