This is a junk DJ controller, the Numark Mixtrack Pro II. It seems to power on, but it is not recognized by a PC. The problem is probably with the USB connection, but I don't know the details. Is there anyone knowledgeable who can fix it? Also, the knob in the fourth photo is missing, so I've made it usable with a LEGO block. There are no accessories, only the Numark Mixtrack Pro II unit itself. - Brand: Numark - Model Name: Mixtrack Pro II - Features: 2 turntables, 8 pads, effect control - Connectivity: USB connection - Number of Buttons: 10 buttons, 6 knobs - Size: Compact design - Usage: DJ performance, mixing Thank you for looking.