The Dalek voice changing helmet from ThinkGeek has three buttons: “the top one plays prerecorded Dalek messages, middle button plays the Dalek extermination sound effect and the third turns the helmet into voice changer mode.” Video after the break. Click here for one more picture.
Yell all you want and sound like the Daleks you love. When you wear the Dalek Voice Changer Helmet and command the copier to “Col-late!” it will snap to attention. Or else.