control 2 computers with one controler

[Soper777]

I use powerpoint presentations in other countries. On the computer powering the projecter for audience is one powerpoint in that countries language. On my laptop at the podium is the same identical powerpoint except in english -- I need a controler that will advance both computers at the same time.

there are lots of usb controlers that run the computer just fine - but because of different code or frequency [or what ever] it seems if each controler is limited to one computer --any body have any ideas -- keep it simple, so I can understand it.