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.The JBL Charge stereo speaker has a massive, built-in, 6000mAh Li-ion rechargeable battery that provides more than 12 hours of playback time on a single charge. The battery is easily recharged from the speakers built-in USB port, which saves you battery hassles and money.