With this electronic helmet, you can pretend to be Darth Vader and sound like the evil Sith Lord! The helmet looks like the one worn by Vader in the Star Wars movies. The voice changer button changes the sound of your voice so that it takes on the familiar - and menacing - sound of Darth Vader¿s voice. The sounds button on the helmet activates Darth Vader breathing sounds and plays signature Darth Vader sayings. The helmet comes with batteries and has straps that adjust for a comfortable fit.