The TRAKTOR KONTROL S2 is a versatile DJ controller, perfect for DJs. - Model: TRAKTOR KONTROL S2 - Color: Black - Function: DJ Controller - Number of Buttons: Equipped with multi-function buttons - Number of Knobs: Equipped with effect knobs Thank you for viewing. I used it a little about two months ago, but I am selling it because I switched to other equipment. I have confirmed its operation myself, and the store where I bought it also confirmed its operation with other software (such as Traktor Pro). The original box is not available. I will include the cable that originally came with it to connect the controller to a computer. There is no serial number. Please feel free to ask if you have any questions.