Pre-owned in very good condition.
This is the Steinberg SMP 24 midi expander for use with the Atari computers running Steinberg Cubase software. Ideal for multi midi module setups It is compatible with the Atari Falcon where the midex normally ain't. There are 4 midi outs and 2 midi ins as well as a host of other ports. Mains powered and connects to the parallel (printer) port. The display shows what you're doing, timewise.