Excellent audio interface! If you're interested in this then you probably already know a bit about the RME reputation. But, here's the Sweetwater description:
"The RME Fireface UCX II packs a lot into its rugged half-rack housing. This 20-in/20-out USB audio interface includes two reference-quality microphone preamps and ample analog, digital, MIDI, and word clock connectivity for easy integration into any studio rig. The Fireface UCX II's SteadyClock/femtosecond technology yields ultra-stable clocking, and its DC-coupled outputs permit sending CV/gate voltage control information to modular synths and other studio hardware. Take complete command of the Fireface UCX II with TotalMix FX — no external hardware mixer required — with loads of latency-free effects available for each channel. You also get comprehensive onboard metering, a DURec port for direct recording to a thumb drive or external hard drive, and support for RME's ARC USB remote controller (sold separately). If you want to upgrade your studio with a high-level audio interface, the Fireface UCX II is an excellent choice."
This was my first professional audio interface, and, as you can see in the photo, I am still using it and will until someone buys it or I buy a MADIFace.
I love this interface and Total Mix. I own two other RME interfaces, and I'm selling this one because I no longer need it.
I will ship with the original box and cables.