Sharp GX-BT7 2.1 Channel Wireless Bluetooth Speaker System 2.1Ch Bluetooth speaker system w/ dual active subwoofer, Sleek design with moving mechanism Bluetooth function with a free standing NFC tag, 20W TTL RMS output power LED light indicator, Synchronized LED light with music, USB for iOS/Android devices Playback and charge Apple/Android devices via iAP & AOA compatibility MP3 & WMA compatibility