Advanced CSR Chip, Broad Compatibility & Surprising Sound - Equipped with advanced CSR chip for seamless and stable connection to your smartphone, tablet, laptop and other Bluetooth-enabled devices up to 33ft away. 9W high performance audio-driver with 52mm/4 NdFeB magnet speaker and 425ml large acoustic chamber plus NCN tech deliver high quality sound with exceptional clarity and no distortion even at maximum volume. FM Radio & AUX Player - This portable Bluetooth speaker uses a dedicated FM chip independent of CSR, ensuring high sensitivity and enabling you to listen favorite radio stations with crisp clear sound at any time. The headphone jack in the rear of the speaker can be inserted the supplied 3.5mm AUX cord to get good radio reception. And the AUX input allows you to use the speaker with most 3.5mm equipped devices. Long Playtime - Built-in rechargeable 2000mA Li-ion battery supports up to 10 hours of wireless / AUX playtime or 20 hours of FM listening time (varies