To activate your Multicolor LED Fiber Optic Wands, press the button on the handle. With each push of the button, change the LEDs to 1 of 6 options. – Length: 13.5 in., 34.29 cm. – Width: 1.25 in., 3.17 cm. – LED Colors: Blue, Jade & Red – Twinkle & Shine Light Wand with Fiber Optics includes 4 replaceable AG13 Batteries.