Our Sound Activated Light Up Circle Bracelets are the perfect accessories to have at your next event! As the sound increases so does the flashing of the lights! These come in a variety of colors as well! Just choose between Multicolor, Red, Blue, or Green. To activate, just press the small button inside of the bracelet. Batteries are included and already installed so all you need to do is put these on and turn up the music! These are ideal for festivals and any event with high energy music!