Ezapor Ultra-Portable Wireless Bluetooth Speaker Powerful Sound with Build in Microphone Supports Wireless Music Streaming via New Bluetooth v3.0 Technology. Two highly powerful 40mml total 6W acoustic drivers and ultra-small size produce a wide audio spectrum. Built-in Li-Ion Rechargeable Battery for up to 10 hours of playtime. Built-in microphone for hands-free speaker phone calling Easy to pair - No code/pin needed Easily to carry with, only 8.3 ounces.Plays all Audio devices through 3.5mm Aux in Jack. Build in Mp3 player included, it could automatically play the music with a stand alone Micro SD card. (the Micro SD card does not include in the package)