Mackie Big Knob Studio Command System. It is in excellent condition, tested and the unit works well. 
Supplied with mains cable.
Grade A.
Free Postage.
 
Features:
Solid build quality with large controls and good LED indication.
Excellent audio quality.
Sensible routing options.
All balanced connectors with gain switches and trims where required.
Includes talkback. Talkback foot-switch input.
2 Headphone amp.
5 source input ( DAW-2TRK-A 2TRK-B -PHONO, Headphone mix.)
3 monitor output.
direct output from 5 sources.
Stereo phono input with GRD.
High-quality performance and reliability.
Mackie Big Knob Studio Control Center is a very useful tool for your recording and mixing setup.