LED frisbees make it fun and easy to play frisbee in the dark! Each frisbee measures 7.75 inchesin diameter and features a bright LED light * These light up frisbees areperfect for when you want to play catch with your dog at night or for anynighttime ultimate frisbee tournaments * Don"t forget to wear an LED necklace and bracelet for even more visibility! Batteries are included and installed * Each box contains 1 LED frisbee.