To activate your Multi Color LED Fiber Optic Wands, press the button on the handle. With each push of the button, change the LEDs to 1 of 6 options. Twinkle & Shine Light Wand with Fiber Optics includes 4 replaceable AG13 Batteries. Specifications: Length: 13.5 in. Width: 1.25 in. LED Colors: Blue, Jade & Red