Purchased on October 27, 2024. I was using this for DTM sound field adjustment, but I usually turned it off and didn't use it much, so I'm putting it up for sale. It's very convenient because it skillfully compensates when you can't listen at a high volume or the room's acoustics aren't very good. In particular, it doubles the power of audio interfaces that aren't very expensive, such as those in the 30,000 yen range. Please see the photos for minor scratches, etc. All accessories and the serial number are included. Price negotiations are welcome. ARC Studio, which achieves high-precision acoustic correction. - Model Name: ARC Studio - Function: Advanced Room Correction System - Input/Output Terminals: XLR Input x 2, XLR Output x 2, USB Terminal - LED Indicators: Power, Signal, Correction Display - Color: Silver Thank you for looking.