In order to maintain order and prevent formation of crowds, audio paging systems with displays can be used, which are the updated versions of traditional techniques such as calling out. Using these systems, the customer whose turn has come can be paged by entering his designated number into the keypad, which will then be displayed on the receiver an also announced by the speakers. The DC-200 is a wall receiver which can display a single row of 3-digit numbers, and is used in ice cream shops, banks, pharmacies, notary publics’ offices and telecommunications departments. It is employed in any place that requires queue management to prevent formation of crowds and to complete the servicing system. Other places where this system can be used include restaurants, fast food bars, food courts, hospitals, treatment centers, clinics, car washes, offices and hotels.