The Pioneer DJ DDJ-400 is a 2-channel DJ controller with a USB connection, featuring touch-sensitive jog wheels and a variety of effects. Thank you for viewing. The exterior shows signs of use and aging, including scratches and dirt. As this is a used item, the exterior shows scratches and dirt from use. The condition is generally good. I was able to confirm that it powers on and is recognized when connected to a computer via USB. Due to its many functions, I have not been able to check everything. Please consider the current condition as is.