The portable Philips CD sound system is a complete device that you can take with you everywhere. It frees your music from various sources - Bluetooth, USB, CD, cassette tapes, DAB, and FM radio. Wireless music transmission via Bluetooth through your smartphone. With USB Direct function, simply connect your desired USB device to the USB port of the Philips device and enjoy direct music playback from the device. The bass reflex speaker system delivers a rich sound experience from a compact speaker system. It differs from conventional speaker systems as it has an additional bass pipe, acoustically aligned with the woofer, to improve low-frequency damping of the system. The result is richer bass and less distortion. The system works by tuning the mass of air in the bass pipe to vibrate like a conventional woofer. Combined with the woofer's response, the system extends the overall low-frequency sound for creating a new dimension of rich bass.