when you press and hold for a second or so you should hear a tone - there are several commands you can give... once you program your system with your phone book you can simply saya command such as "dial John".. or you can simply say "dial number" and then proceed to dictate the number outload... I believe their are a dozen or so commands available.. I believe if you use the search function and search "voice command" you will find the info you need...