The CDN22 is a classic budget twin CD player, and while it's very much the entry level product in the Numark CD player range, it still offers a good range of features for your money - jog/shuttle wheels, digital outputs - all in all great value for money. New Mk4 version features new software, and a single linking cable between the base unit and controller - but is otherwise the same as the CDN22 Mk3 machine.