Record your voice, sounds, music or a message of your choice onto these recordable answer buzzers!   "Game-show" answer buzzers turn any lesson into a game Ideal for testing Interaction actively engages students Buzzers allow you to record your own fun buzzer responses; a different sound for each buzzer Easy-to-use! Simply tap a buzzer, record a response, tap again and listen! Each response can last up to seven seconds Buzzers measure 9cm in diameter Each answer buzzer requires 2 AAA batteries, not included Set of four Recordable Answer Buzzers