More on Amazon.com : http://www.amazon.com/gp/product/B000MT4CZS?tag=purrfectcatdi-20 <br /> <br />Valcom V-2001A One Way 1 Zone Enhanced Page Control with Built In Power <br /> <br />Phantom zone allows paging to all speakers but limits music to selected speakers <br />Background music mutes during page <br />Unlimited expansion <br />Emergency page override for priority announcements <br />Built-in tone generator for night ring time clock tone door bell
