Stream high-quality audio with the black Onyx Studio 2 Wireless Speaker from Harman Kardon. This speaker features Bluetooth connectivity for streaming audio from all your compatible home and mobile devices. It's equipped with four drivers-two 3" woofers and two 0.75" tweeters-and two passive bass radiators that are designed to deliver an enhanced sound experience with a balanced and powerful soundstage. In addition to its Bluetooth connectivity, the Onyx Studio 2 is equipped with an Aux port for lining in audio from compatible sources. It features a built-in speakerphone for hands-free calls. Its built-in rechargeable battery is designed for up to 5 hours of wireless playback time.