Music Disk Recorder for Electone series of keyboards.Records your performances on to floppy disk. It works like a cassette tape recorder, but it records performance data instead of sounds. The MDR-3 not only records the notes you play; it also remembers the voices and rhythms you select, the front panel controls you change, as well as all the expression pedal, footswitch and knee lever positions, to reproduce your performance exactly as you play it. Moreover, you can separately record different parts of your performance, building up a song part by part. Compatible with HS series / EL7 / EL15 / EL25.* Requires 10 volt DC power supply (Not included)