Sound Activated Battery Pack (2 AAA Batteries)

This sound activated battery pack inverter will light up your el panel or t-shirt in reaction to sound and music. When you turn on the battery pack it will light up in response to the beat of the music or sound of your voice or any noise. There is a dial on the side to adjust the sensitivity so that you can adjust it if the music is too loud or not loud enough. It uses 2 AAA batteries (not included).