LED Bracelet Wrist is made of nylon, designed with magic tape, fashionable, practical, and versatile accessory suitable for both adults and children. Available in battery and charging options. Battery version is powered by 2 RCR2016 batteries (included). With three different modes to choose from, fast flash, slow flash and constant light. You can adjust the lighting mode according to your preferences. Nicely visible while walking, riding, running, or on a motorcycle at night.