Make games fun and exciting with Learning Resources Answer Buzzers.Each of the 4 audio-only buzzers is pre-programmed with a distinctive attention-getting sound (Boing!, Ding!, Honk! Honk!, and Ding Dong!).The sounds are loud enough to be noticed in the classroom and at home, and are great for shy children.Each buzzer measures 9cm in diameter and requires 2 AAA batteries, not included.(Note: Buzzers do not light up, are not programmable and are not compatible with Alexa.)