The DN-500CB is a highly-versatile yet affordable media player that excels in applications where users bring their own devices , the DN-500CB plays not only CD media but provides Bluetooth connectivity, USB playback and a 3.5mm AUX input for connecting virtually any other playback device. Perfect for retail, education, and hotel/conference applications, this player offers features normally found on higher-priced players, such as Front Panel Lock, Power On Play, memory of settings after loss of power, and RS-232c port on the rear for control via serial command.