Learning Resources Lights And Sounds Buzzers, Game Show Buzzers, Classroom Supplies, Trivia Night Buzzers, Set Of 12, Ages 3+Boost student response during any class activity or game! Sounds mimic real world objects a siren, a game show buzzer, a laser and a 'charge!' sound. Buzzers come in 4 different colors (red, blue, green, orange). Each measures 31 2' in diameter and requires 2 AAA batteries, included. Set of 12