Experience powerful, room-filling sound with the Harman Kardon Onyx Studio 9 Speaker in Gray (Renewed). Designed with elegance and premium performance in mind, this speaker lets you stream music seamlessly from up to two mobile devices at the same time, so you can easily share playlists and enjoy dynamic audio with friends and family. With its built-in rechargeable battery, you'll get up to 8 hours of portable playtime, making it perfect for moving your music from room to room or taking it on the go. The Onyx Studio 9 also features smart self-tuning technology that automatically calibrates sound based on its surroundings, ensuring optimal performance wherever it's placed. For an even more immersive experience, you can wirelessly pair two Onyx Studio 9 speakers to create a wider, more detailed stereo soundstage. Plus, with the Harman Kardon One app, setup is simple, and you can easily customize audio settings, adjust EQ, and manage multiple compatible speakers from one place. Professionally renewed and tested to work like new, the Onyx Studio 9 combines trusted Harman Kardon sound quality with modern design, giving you premium audio at an exceptional value.