The Light Up Pink LED Armbands for Night Safety are amazing for bike lovers and runners out there. Made for style and safety, the lone runner or bicyclist can feel safe on a dark road because not only does this product shine, it fast flashes as well as slow flashes. Great for late night hikes, bike rides or late night jogs. LED: 1 Pink Strip LED Functions: Steady Light, Slow Flash, Fast Flash Dimensions: 6.5 in. long ; 1.75 in. wide One size fits all Includes 2 Replaceable CR2032 Batteries