A compact, room-filling speaker: Whether you're working, cooking, reading, or dancing, the SRS-RA3000 is great to have around. It delivers ambient, room-filling sound that spreads out horizontally and vertically, essentially creating a large musical "bubble." When you're setting the speaker up, you can calibrate it for your room using the internal microphone. It'll play a few test tones and tune the sound for your listening area. It has easy-to-use function and volume touch controls on top.