Light Up head gear will complete your outfit at your next event! To activate your LED Headband, remove the safety tab and press the on/off button on the back of the battery control box. These head pieces feature red and blue LEDs and 3 awesome modes! Modes: Mode 1: Fast Strobe Mode 2: Slow Strobe Mode 3: Tricolor Fade Dimensions: Height 7.50in. Width 5.25 in. LED Colors: 4 Red, 4 Blue (all red on red bow) Batteries: Comes with 2 replaceable CR2016 batteries