Now you can answer the telephone without anyone recognizing your voice. Press a button and completely change your voice. There are 8 different voice changing settings. A man can sound stranger, a women like a man, or a granddad like a child. Unlike most voice changers, the Voice Changer connects to your handset, making compatible with most telephones, even office phones. Travels anywhere, measures just 3" x 5" x 1/2". Voice Changer operates on 3 AA batteries and includes handset connector cable. . Please note, this voice changer digitizes your voice and DOES NOT sound completely human. Will not work on cordless phones or phones with dialing buttons on the handset.