Mini size with maximum sound. Improve and enjoy mobile audio experiences with the MANHATTAN Mobile Mini Speaker. It's small but delivers impressive, full-range sound from iPods, iPhones, notebook computers, MP3 and portable CD/DVD players, mobile phones, hand-held games and other portable media devices. A unique, retractable resonator easily extends to further deepen and expand bass response and enhance audio performance. Its 3.5 mm stereo / USB type-A male to USB mini B male cable quickly connects to easily share music and other audio or when headphones aren't desired. The built-in rechargeable lithium battery provides up to eight hours of use and enjoyment. Compact and lightweight, it stores in a pocket, purse or notebook computer case and quickly installs without special drivers or an external power supply to enjoy favorite sounds almost anywhere.