Restaurant Queue Manage System Queue Call Button

How small queue manage systemworks? 

1. Customer go to the Service station and take a number ticket by Thermal printer or ticket dispenser .
2. Customer wait for their service. 
3. When it is their turn, the counter worker will press next to call.  
4. The customer's number (start from 001 or A01 or 01)  will show on the display screen with prompt sound, 
so that customer know which counter they should attend.then press next again, number will goes to next number. if press LAST, number will goes to last number. 
 Features: 
1 Applications: Restaurant, Coffee Shop, Fast food Chain, Food Court, KTV, Pub, Service Centre, Clinic, Supermarket.Provides fair, organized, efficient customer service  

 K-O2-N queue call button specification : 

Simple to operate with a 23A 12V  battery
work with display can call number in turn 
Dimension: 60*60*20mm
frequency :433.92MHZ 

It need work with queue display 

Applications:
Tea or Coffee House, Restaurants, Hotel Conference Rooms, Executive Dining Rooms, Spas and salons Health and Fitness clubs, Hospitals Health Clubs, Offices Massage House, Nightclubs, Bowling Alleys, Churches, Casinos, Golf Country Clubs, Bank, Medical Clinic, Fitness center, Chess and card room, Relaxation club, Kitchen, Confinement center, Super Market, Church