A-173-1

Micro Keyboard

A-173-1/2 is a module combo that is used to generate a manually controlled 1V/Octave CV signal and up to 15 manually controlled gate/trigger signals. Typical applications are the transposition of a sequence by means of the CV output (without the need of an external keyboard and CV interface) and the manual generation of gate/trigger signals for start, stop, envelope generator triggering and other trigger tasks.
(Above information copied directly from the Doepfer website.)

http://www.doepfer.de/A1731.htm