The PS4001BT is the world"s smallest Bluetooth Hi-Fi system. This pocket sized, ultra-portable speaker is all you need to fill a room with your favorite tunes at surprisingly loud and crisp sound levels. Eliminate clutter and roam freely while streaming music wirelessly from your computer, phone, iPod or other audio device. Perfect for home, office and especially on-the go, the built-in high capacity Lithium battery provides unrivaled continuous playback time with up to 20 hours on a single charge. Pairing instantly with your device right out of the box, the PS4001BT is in a class of its own. Available in rubberized black & red & glossy white finishes.