A wireless PA system has shown useful in schools and other establishments for many years now, improved the earlier layout of a hardwired network. The wireless PA system has extra value and energy based upon its transportability (i.e., no cords) and modularity; if a service already has a hardwired public address system, it might or may not be cost-efficient to update, which would then make the existing network basically outdated. This short article deals with the advantages of a standard intercom as well as additional benefits of using wireless interactions. https://speakerdeck.com/wirelessschoolclocks