My used Numark Mixdeck Express Black USB CD CDJ Controller. Perfect for beginners and experienced DJs alike, this double deck controller features 2 channels and 2 decks, and is compatible with both PC and Mac. With a USB and CD input, you can easily create transitions, and it comes with MIDI input to work with most DJ software. This controller comes in black and is in great working order, making it bang on for anyone wanting to start or progress DJing. They taught me how to mix without waveforms and use my ears and for that they are invaluable. Everything is in fine working order, there is nothing wrong with them at all.