The Smart Voice Changer is a very cool compact voice changer that fits comfortably in your hand. Turning this children's voice converter into a loudspeaker at the push of a button is a great way to make a big announcement! The Smart Voice Changer bright and friendly design makes this toy the perfect companion for children over 3 years old. 7 Voice Converter Sound Modes total. Powered by 3PCS AAA battery (not included).