The DN-300C is a high-performance 1U-sized player. It has the added flexibility of a convenient port on the front panel to playback material from a USB thumb drive. It is easy to use, and the purity of the audio performance is great. The DN-300C can be used for professional use with its Front Panel Lock function, Power On Play function and Resume of settings even after power recycle. This product is ideal for retail shops, hotel/conference and education.