Bluetooth Speaker ,CINEYO(TM) Ultra-Portable Wireless Bluetooth Speakers,Powerful Sound with build in Microphone, (RED) Two highly powerful 40mml total 6W acoustic drivers and ultra-small size produce a wide audio spectrum Supports Wireless Music Streaming via New Bluetooth v3.0 Technology. Built-in Li-Ion Rechargeable Battery-Built-in microphone for hands-free speaker phone calling Easy to pair . Build in Mp3 player included, it could automatically play the music with a stand alone Micro SD card. (Micro SD not included in the package)