Original OrigAudio Universal Volcano Portable Rechargeable Speaker (3.5mm) - Black features Great portable sound for your iPod, iPhone, iPad, MP3 Player, computer, cell phone, and more Built-in, untwistable bass expansion system Can connect other OrigAudio Volcano Portable Speakers to make it even louder! Unique, fun high excursion speaker design offers a powerful and portable sound Wraparound 3.5mm cable for easy portability and easy to use controls with power switch and built-in rechargeable battery Dimensions: 2.6" x 2.6" x 2.55" Speakers: 2.5W RMS Net weight: 3.13 ounces Play time: 10-12 hours per charge Audio input: Standard 3.5mm headphone plug Frequency Response: 100Hz - 20KHz Brand: OrigAudio Color: Black Type: Cell Phone Speaker Compatible Phone Manufacturer: Universal