Hi Ronny,
I guess that the RMX1000 as most of the modern electronic equipments has a switching power supply, therefore it works at any given voltage between 100 and 240 Volts.
However before plugging it in Europe you should double (or triple!) check: it should be written on the power supply itself, for instance on my desk now I have a Nokia phone charger and a Dell laptop power supply and on both of them it's written on their back "110-240 V". If not written on the power supply itself, it must definitely be stated in the user manual.
I find rather strange that on your equipment it says only 120V 60 Hz, but maybe it's a US norm, afaik here in Europe the whole voltage range is always written on power supplies.
Check again on your hardware, your manual and maybe ask your vendor before plugging it in Europe.!