I have one of these USB pendants, but I never use the "Spindle On/OFF" buttons and rather map it to a different function from within Mach3. I couldn't find it anywhere and I even went as far as trying to create a application to capture the F5 button press and then auto press the home button, which is from what I can tell happens.

Any advice on configuring the buttons on the device? There aren't any instructions that come with this thing..