Dynamic Bass Boost for deep, dramatic sound Dynamic Bass Boost maximizes your music experience by emphasizing the bass content of your music at all volume settings - from low to high - with the touch of a button! The lowest bass frequencies are usually lost when the volume is turned down. To counteract this, Dynamic Bass Boost can boost bass levels so you can enjoy consistent sound even when you turn the volume down. CD Shuffle/Repeat for personalized music enjoyment The "Shuffle/Repeat" function helps you avoid the boredom of hearing your music played in the same order all the time. Once you have loaded your favorite tracks onto the device, simply select one of the functions - "Shuffle" or "Repeat" - and your songs will be played in a new order. Enjoy a different and unique music experience every time you plug in your player. Audio-in for easy portable music playback Make a single connection and enjoy all your music from portable devices and computers. Simply plug your device into the audio-in (Audio-IN - 3.5mm) port on the CD player. On computers, the connection is typically made from the headphone output. Once connected, you can enjoy your entire music collection directly on a set of great speakers. Philips simply delivers better sound.