I have just ordered 2 of these units from US as they are not available in UK yet.
They have 3 switches and one input for volume / expression pedal.
They also have a step sequencer which is a nifty little add-on to the product. It lets you program a sequence of different MIDI messages that foot switches can cycle through. A single foot switch can send an many as 8 sequential messages. Users who need more bang out of the 3 foot switches can get it through that functionality.
The setup panel is available for free download at their website. Programming of the switches happens through that utility.
When tested I will let you know how they work especially the volume pedal input.
jon
UK
http://www.logidy.com/?pid=0