The Nite Ize Nitelife Led Necklace uses replaceable batteries and long-life LEDs to provide 360 of colorful illumination around the wearer for 60 hours. Perfect for concerts, festivals, Halloween, or just feeling funky, the NiteLife makes light of any situation. With the simple press of a button it can be set to glow or flash mode, making the wearer instantly visible and making any situation more fun and even safer. It can also be cut to size giving it the perfect fit for anyone as a necklace, bracelet, or headband.