External CDROM chassis for the A1200 and A600. I am unsure exactly how this connects to the A1200 and A600 but it's probably via the internal IDE controller or a PCMCIA connector as it has the option of adding a 2.5" IDE Hard Drive. The unit draws power from the Amiga via the use of the external floppy drive controller for a 5pin DIN connector, presumably for use with an external power source. This unit was usually supplied with CD ROM software AsimWare.
Thanks to Iggy Drougge