Hammond FS9 Footswitch by Hammond

Footswitch for XM-2, XK-1, XK-3. Pro XK System

It is ideal for switching from slow / fast Leslie - Sustain etc depending on how you assign the footswitch from the Hammond XK's control menu

The FS9 footswitch is also known as the FS-9 FS-9 FS-9H FS9H FS9