The iSound GoSonic speaker delivers crystal clear sound from your audio device in a small and highly portable design powered by a built-in rechargeable battery. Connect the GoSonic with your audio playing device via the included 3.5mm audio cable and enjoy your favorite tunes for 2.5h hours or more depending on volume. The speaker recharges back to full power quickly within 3 hours using the also included mini USB cable. The GoSonic is the perfect speaker to enjoy your audio anywhere. Take it to your office, campsite, yard, beach, gym or use it at home!