We love watching lights bounce to the beat of the music at clubs or parties. This compact light bar is like a mini handheld version of a nightclub lighting fixture! Reacts to sound, with 7 multicolor LED lights that flash outward from the center. Extremely bright! Features a sound-sensitivity wheel that can be adjusted for different sound environments to provide the best light show. Nice portable size (5" long x 1.5" wide x 1.75" deep) allows you to take this anywhere and even slip it into a pocket. Uses 3 AAA batteries (replaceable).