JBL Tune is a multi-function Bluetooth Speaker that's compact, light-weight, simple and stylish. JBL Tune is pocket-friendly and exceeds the needs of the on-the-go music lover. Completely portable and wireless, it provides exceptional sound. The JBL Tune Bluetooth speaker allows full stereo streaming with your favorite devices. You can also enjoy music across FM channels. It doubles as a conference phone system with built-in microphone functionality. Wireless Bluetooth Streaming Streams music wirelessly through Bluetooth. Compatible with a variety of mobile devices Rechargeable Li-ion Battery Built-in rechargeable Li-ion battery supports up to 6 hours of music at a stretch Portable Design Compact, light-weight, simple and stylish SD Card Reader Plays Micro SD (TF Card) / U Disc format files. Compatible with MP3, WMA, WAV format music files Universal Interface AUX-In (3.5 mm) input connection port and headphone output interface. Multi-function Bluetooth Speaker connects to a variety of mobile devices