FastFox Portable Bluetooth Wireless Speaker,Support Micro SD Card FM function Steroe Wireless Bluetooth:Bluetooth 3.0+EDR international standard,you can adjust the volume directly through the stereo.10 meters high-fidelity transmission with nondestructive,super portable,shock sound,specially designed for smart phones and tablet PC. Speakerphone function:support speakerphone,built-in microphone to bring clear calls for you,it's very perfect either with single or multiplayer for phone calls or video chat. Pure music,perfect to enjoy:Stereo speakers built-in resonance radiator device,equipped with high-effciency power amplifier,super-low-frequency dynamic bass-rich,flexible,achieve a more shocking extremely super bass effect. Lasting power,long battery life:two power modes,built-in lithium secondary medium volume with 8 hours of playback capability,suitable for any occasion. Support: USB Flash & Micro TF Card Playing, FM function, Aux port, Headphone output, answer phone calls free wirelessly