The jbl charge delivers unsurpassed portable audio performance from your mobile devices and tablets. It provides more than 12 hours of playback time from its built-in, high-capacity, 6000mah li-ion rechargeable battery, and it can even charge your other mobile devices on the go via its built-in usb port. With two 1-5/8-inch (41-millimeter) full-range drivers and a built-in bass port, it produces full-range jbl sound with exceptional bass. It also wirelessly streams audio from any bluetooth-equipped smartphone or tablet. The jbl charge wireless speaker is a portable audio powerhouse for any environment.