Harman Kardon Onyx Studio 2 Wireless Speaker System with Rechargeable Battery and Built-in Microphone,Black Wireless Bluetooth 3.0 A2DP v1.3 AVRCP v1.5 Rechargeable Battery Two 3" woofers, two 0.75" tweeters and 2 passive radiators 15W x 4 biamplification Speakerphone