The Harman Kardon Onyx Studio 2 Wireless Speaker is a favorite among interior designers due to its unique and aesthetically pleasing design. It's also a favorite among music lovers because, well, it's a really good speaker. The Onyx Studio 2 features two 3" woofers, two 0.75" tweeters and two passive radiators which deliver deep bass and an overall amazing audio performance. The Harman Kardon Onyx Studio 2 Wireless Speaker also feature Bluetooth 3.0 interface and Social Mode which lets you pair with two devices simultaneously so you don't have to keep disconnecting and reconnecting your devices. The Built-in microphone features echo and noise cancellation, and the built-in rechargeable battery gives you up to five hours of play time.