thats a hantarex polo 1 monitor,it will work fine on 120vac in the usa.
the only difference you find in monitors really is the voltage needed to run them.
the one you have pointed out is whats known as a free voltage range,this means it runs at anything from 80vac to 265vac also as it has an onboard switch mode pòwer supply there is no need for an isolation transformer which means you can plug the voltage in directly to a wall socket
make sure you get the video input plug/cable and the voltage input plug/cable with the monitor as they could be difficult to find in the u.s
also important to note that this is cga(15khz) only monitor so it works on the older type games,if you wanted to run a pc or another vga signal you would need some kind of signal converter whether it be an arcade vga card or soft 15k running from a standard vga card or some kind of dedicated vga to cga converter
i have worked on alot of these and i love them,very easy to repair and reliable-i have approx 20 of these monitors in my arcade.Ken hates them but there again you americans are strange
