Anker Wireless Bluetooth Speaker, Portable Wireless Bluetooth Speaker (A7909) with Breakthrough 24-Hour Battery, 10W Portable Wireless Speaker with Dedicated Bass Port (Black) Stunning Stereo Sound: Experience your music in stunning stereo realized through dual five-watt drivers and dedicated bass port. Day-long Playtime: Breakthrough 24-hour / 500-song playtime powered by a built-in 6200 mAh Li-ion battery. Bluetooth 4.0: Instantly connect to your smartphone or tablet from up to 33 feet away. It remembers the last eight devices used, so reconnecting is automatic. NFC Connectivity: Simply tap and start your tunes in seconds with any NFC-enabled device, a feature absent from the vast majority of portable speakers. You can also connect via AUX line-in. What You Get: Anker Portable Stereo Bluetooth Speaker (A7909), micro USB cable, AUX cable, travel pouch, welcome guide, our fan-favorite 18-month warranty and friendly customer service.