This necklace uses fiber optics and super bright LEDs to create the dazzling red, white, and blue effect. A push button lets you select between various blink and chase modes. A modular connection design makes it easy to string together multiple necklaces for all kinds of decorative, performance and costuming uses by turning the necklace into an approx. 1 cm diameter unlimited-length tube. Each necklace is a long 28" length. Necklaces currently come in a WHITE tubing color. Uses 3 replaceable AG13 batteries (included).