Just like the expensive units you hear the DJ’s use, it changes your voice in a multitude of effects! You can sound just like a robot, you can change the pitch of your voice variably from low to high. For even more effect, ad vibrato effect to your voice! Great for parties, recordings, bands, and the ever popular “prank phone calls”! Not as though we endorse those incredibly funny prank phone call CD’s, TV shows, and DVD’s!