: glow sticks are plastic-Material and LED lights The lights is soft and eye-protection, easy to use Battery Operated: 4 button batteries are used for power supply ( not included), which is easy to remove and replace and Party supplies: these colored led sticks are the great for birthday parties, weddings, dances, sports activities, concerts, Halloween and Christmas, and can add fun to any night activities Funny gift: These glow stick party supplies are party adults and novel toy for children Three modes: press the power button of led light sticks to switch between the three modes It includes fast flashing, slow flashing and constant lighting Suitable for different occasions and environments