20 Digital Restaurant Coaster Black Call Pagers / Guest Table Waiting Wireless Paging System with Charging Dock and Transmitter Expandable up to 99 pagers Transmitter Range: 1/2 Mile / 800 meters Vibration, flash, beep, and glow alert A pager will eliminate walkaways and increase revenues right away! Minimize crowds in waiting areas! Increase productivity! Reduce labor costs!