This is versatile studio monitor controller, and it is in good working order. I retired it when I bought a console with monitor controls built-in.
The Behringer Xenyx Control 2 USB is a studio control and communication center that features a master volume controller, source selector, monitor switcher, and built-in talkback microphone. It also includes USB connectivity and multiple stereo inputs and outputs, making it ideal for recording and mixing in a studio environment.