Hand-held Cordless Telephone Voice Changing Transferring Device Changer Wireless Mini 8 Multi Voice Changer Microphone Worlds best high quality telephone voice changer We have had voice changers before but NEVER as good as this model. Its designed by an American Engineer who also developed our most popular bug detector. Runs on one 9 volt battery. Comes with handsome carrying case and detailed instruction manual. You just have to hear the quality of this unit to believe it. You can change your voice from male to female at will or simply disguise your voice beyond recognition.