How to work of wireless calling system

Waiter calling system restaurant consists of Number display receiver,table call button,waiter watch. 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 Number display receiver:

1. With high strength aluminum alloy shell
2. Use digital code technology
3. Wall mounted        
4. Show 3-digit number from 001-999, the first number can be alphabet.
5. It can work with 999 call button in max
6. It can save 63 calling info in turn
7. Antenna can enhance the distance  
8. Dimension: 365*158*40mm
9. With English Prompt voice or common type with "dingdong" only

Specification of table call button

Single key: Call                                                   
Signal Distance: 200M in open area     
Material: PC  
Dimension: 60*60*30mm    
Color: white; black; blue; yellow; gray; red                                
With a 12V 23A battery
Any language any logo is acceptable

Specification of waiter watch

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 call come in and count the call times of each number 
6. Can track the history 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 Lithuim battery
10.Dimension: 50*51*16mm
11.Color: Silver, blue, green, red, black
12. Output: DC5V--1A