[PORTABLE POCKET SPEAKER FOR HEAVY BASS] - Enjoy heavy bass every time you plug the music in. With the pocket-size design of the Breeze 4 wireless speaker, there is just enough space for audio perfection and portability to resolve your musical issues. [BUILT-IN MICROPHONE FOR CLEAR AUDIO] - Breeze 4 wireless speaker comes with a built-in microphone. Now answer your calls easily with this wireless speaker and achieve the optimum voice clarity to carry it to the other side of the call.