How to work of wireless calling system

When the guest need any service, they can press the button on the table, the table number will be showed on the RECEIVER of watch or display screen with clear “dingdong” sound or vibration. So the waiter could offer service very timely.

Specification of display screen

1. With high strength aluminum alloy shell
2. Use digital code technology         
3. Wall mounted Desktop
4. Show 3-digit number, work with 999pcs button in max
5. It can save 63 calling info in turn  
6. Antenna can emhance the distance  
7. Dimension: 220*120*40mm
8. Output: DC12V
9. English Prompt voice or common type with "dingdong" only

Specification of waiter pager 

1. Can work with 500pcs multi-key transmitter in max
2. Can show 3 group call number in one time 
3. Show 4-digit number from 0001-9999 and first alphabet can be A-Z
4. Can indicate different service type via words or alphabet ( call; bill; drink; dessert; help etc and A-Z)
5. Can record when the calling come in and count the call times of each number 
6. Can track the history of calling info by up and down
7. Show current time when stand-by
8. 3 reminder ways: sound prompt and vibration or both 
9. Battery is rechargeable: 3.7V Lithium battery
10. Dimension: 70*42*16mm
11. Color: Red and Black
12. Output: DC5V--1A

Specification of call button

Power bank to charge the phone
Have a lighting when you press
3 key: Call; Bill; Cancel                                                  
Signal Distance: 200M in open area     
Material: high quality PC+Acrylic
Base Color: Black
Base Dimension: 160*77*59mm
Menu Board Size: 212*132*5mm
Battery capacity: 8000MAH
With 4pcs 18650 Li-ion battery
Input power: 7-12V
Output power: 5V/1A