Most people like the idea of taking their music with them wherever they go. While it’s easy to listen to music through headphones or ear buds, you might want to share your favorite tunes with others. Since it’s not always practical (or desirable) to share a pair of headphones with someone else, Logitech offers its Pure-Fi Mobile speakers, which can connect to any Bluetooth-enabled phone, MP3 player, or personal computer with a USB port.