The JBL Flip with Bluetooth capability is an ideal wireless stereo system for smartphones and tablets. With two 1-5/8" (40mm) drivers and a built-in bass port, it delivers full-range JBL sound with exceptional bass - all in a portable package. The JBL Flip offers up to 5 hours of playback time from its built-in Li-ion rechargeable battery and connects wirelessly to any Bluetooth-equipped device. It also features a built-in microphone for telephony and conference calling. With performance that comparably priced products can't match, the JBL Flip is the ultimate wireless portable stereo speaker for any environment.