This is the keyboard.
The knob allows you to control the volume. There is no on-screen display when you change the volume, so you basically have to guess what it is set at, unless you already have the volume adjust window open. The problem is that the keyboard doesn't use VolumeUp/Down. I tried Skan's
ScanCode finder and it gave me nothing.
Does anyone know what this keyboard uses to send the message because I need to hook into that to use one of the many volume display scripts people have posted.