make your voice sound like a robot</br>add vibrato effect</br>use the 'pitch'-buttons and make your voice sound lower or higher</br>built-in microphone and power amplifier with volume control  just add a speaker</br>hours of fun!</br>for parties  plays  recordings  games  etc.</br></br>Product Description</br></br>Great for parties?? recordings?? bands?? and even prank phone calls?? this voice changer makes your voice sound like a robot and can also add a vibrato effect to your voice. Pitch buttons make your voice sound lower or higher. Features a built-in microphone and power amplifier with volume control. Requires 9V battery and speaker(not included).</br><br/>http://www.amazon.com/gp/product/B004XZQ6RE