This is MC-12A’s little brother in size and expandability.
It’s more compact and feel more robust.

And it can be stored and used in the CE-150 case

As you can see it’s not designed to be used without the CE-150. The main I/O are present.

But there is no other I/O connectors except power ones.

No V24 or digital I/O expansion port.

Next time we will open the case 😉