Number wait system recall button

How small qms queue manage system works? 

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. 
5. Applications: Restaurant, Coffee Shop, Fast food Chain, Food Court, KTV, Pub, Service Centre, Clinic, Supermarket.Provides fair, organized, efficient customer service  

K-N3 led queue system button specification : 

Ultra-thin button
Simple to operate with a CR2025 battery
Smooth surface for plastic case and waterproof silicone
3 function: Last, Next, Recall
Dimension: 60*60*10mm

The queue system button K-N3 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