MTI 16R Auto Orchestra Analog Bass and Drum MachineIncludes floor board "chord pedal", expression pedal with switches to start stop, change to minor, minor 7th, and 7ths, and also 16R extended memory (extended memory currently seems to be non functional). All functions appear to work, and this thing is a ton of fun! 16 rhtyhms with bass, piano, and organ accompaniment, with mixing control for all instruments, with chord changes at your feet! Even includes a small control that attaches to your guitar