This is a single rack, mono delay unit. We don't use these very often but they are, nonetheless, quite a bit of fun. Particularly useful is the ability to retrigger the delay using a gate signal into one of the rear input sockets. This allows a number of pretty weird and wonderful tricks to be played which are difficult to achieve using more modern processors. It also does pitch shifting in a fairly rudimentary fashion, allowing it to be used as a chorus or flanger.
Not bad at all. We should use it more.