MMCALL 20 Restaurant Guest Waiting Pagers with Charging Dock and Long Range Transmitter (EXPANDABLE) Expandable: up to 99 pagers. Transmitters and pagers can be added at any time. Extra-long range, up to 3/4 Mile. Programmable alerts: vibration, flash and beep. Any combination is possible. Anti-theft feature minimizes pager loss by alerting guests when they walk out of the transmitter range. Plug and Play: no complicated setup. Ready to use out of the box.