This mouse is Commodore`s CDTV standard mouse, It was included in the Pro pack along with a keyboard, diskdrive, joypad & CDTV.

The mouse is a standard two button mouse like the one used with the Amiga 4000 (Except its black and has a different connector) and connects to the small mini din connector on the back of the CDTV (Marked with a little mouse and joystick).
The left hand mouse is bigger than the right (about 2:1 ratio), The power is suplied by the CDTV from the wire, like most mice, Infact apart from the connector it is a standard mouse.
The mouse is not compatiable with any other Amiga due to the different connector.