A long range wireless PA system is used where a wired system would simply be too expensive. The PA system consists of wireless receiver that is attached to a horn PA speaker. Ranges of several miles can be achieved.
Ooop! The email you entered isn't valid.
WooHoo! You subscribed successfully.
Ok! You're unsubscribed.
Stay Connected
function init() {
var vidDefer = document.getElementsByTagName('iframe');
for (var i=0; i