Thanks for the replies guys, I actually purchased a single pedal unit that hooks in vis the headphone socket on the piano but of course all that does is completely block all sound coming out of the speakers, which is obviously not the result I am looking for! I asked a casio representative what the exact the connector type is and all he came back with was "pedal unit", great. The connector for the pedals is a weird connection, not one I could give you the name of it, so i've attached photos if that helps. I did enquire about whether or not newer models of pedal units would work with it but the representative was unsure, I would be surprised if they don't seeing as they all use the same connector, but I also can't be 100% sure. Thanks again for replying,