Liven up any game with these colourful flashing answer buzzers! “Game-show” buzzers turn any lesson into a game. Ideal for tests and quizzes - interaction actively engages students. Buzzer buttons light up when pushed - four colours: blue, red, green and yellow. Featuring four sounds: siren, charge, laser and buzzer. The buzzers measure 9cm diameter and each buzzer requires 2 AAA batteries, not included.