I bought a second hand Xbox360, which has been either chipped or flashed.

But what questions me, is what's on the front of it.

There's a SATA port (but no power output), and on top, theres 2 switches, which can change from 360/PC and DVD/HDD, and an eject button.

Anyone know what kind of mod this is, and what I can use it for?

Hi mate,

Looks like an early model of the Xecuter Blaster. Means you dont have to open your console again to flash your drive;

http://team-xecuter.com/install-blasterck3/

Regards