Sega CDX
The Sega CDX is a 16-bit video game console released in 1994, combining the Sega Genesis and one of its add-ons, the Sega CD into a single compact unit.
I’m fortunate enough to own one of the super rare and awesome Sega CDX systems. Here are my pictures as proof:

Here is a picture showing the front controller ports and power button:

The Sega CDX uses the standard Genesis 3-button and 6-button controllers, which makes it nice being able to share controllers between systems.
I also have the official Sega CDX AC adapter (says so right on it), but you can also use a Genesis AC adapter too:

What’s so cool about the Sega CDX is that it can play both Genesis and Sega-CD games, thanks to its rear-mounted cartridge slot and its front-mounted flip-top CD drive.
It’s also capable of playing audio CD’s. When I show this system to people, they think it’s a Disc Man player.