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 # Pieces In Set: 12 Number of Batteries: 2 Learning Skill: Sights + Sounds Power Source: Battery (not Included) Recommended Ages: 3 Years And Up Measurements: 7.5 Height/Inches, 8.5 Width/Inches, 8.5 Length/Inches Assembly: Assembled Base Material: 100% Plastic Care: Wipe Clean Country of Origin: Imported