Queue Calling System Pager - Take A Number System Waiting Number System Customer Number System for Restaurant Hospital Bank Barbershop Waiting Line Management (1 Keypad+2 Displays) About this item Keypad: 3-digit number from 001-999. It can call back and recall any number. It have a NEXT key, press "Next+ENT", then number will go to next one. Displays: It can be wall installed or desktop style. And can dingdong or English voice to prompt number change. Displays' voice mode, volume, prompt times, brightness can be adjusted. How to work: give a numeric serial number within 999 to the customer, when order is ready, just press the number you want to call, the display will show the number on the screen accompanied by voice, easy to alert the guests that their food is ready. Great for government offices, pharmacies, retail, patient waiting areas and anywhere waiting line flow can be improved. Eliminates waiting lines, the customers can browse and relax without fear of losing their place in line.