Clean up your rack cables!
I had cables running in and out of my rack unit, both through and empty rack space on the front and out of the back. I purchased this, the 1/4" module and the PPP-000 rack mount, and it has made my setup so clean. For this module, I now can run my guitar direct out box through this, into the front of my in ear transmitter, and back out from the back of the transmitter, through this module again to go out to the PA. No messy loop of cables hanging out from an empty rack space! Love it!