How it work of wireless paging system

Wireless call system is widely used in service area of restaurant, hotel, café, bar, casino, hospital and so on. It consist of call button for guest use and signal receiver for waiter use. 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

1. With high strength ABS plastic shell, durable in use
2. Use digital code technology.
3. Desktop
4. Show number from 1-30, can show 30 numbers at the same time. 
5. Show different service type via different light color
    (Green light =Call, Red light =Bill, Blue light =Drink )
6. It can work with 30pcs call buttons in max
7. It can save 30 calling info in turn
8. Touch screen
9. Read number and service type in English or simple "dingdong"
10. Dimension: 29*15.5*4cm
11. Output: DC12V

Specification of wrist 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 Lithium battery
10.Dimension: 50*51*16mm
11.Color: Silver, blue, green, red, black
12. Output: DC5V--1A

Specification of table call bell

3-key: CALL, BILL, CANCEL                                         
Signal Distance: 200M in open area    
Material: PC and waterproof silicone
Dimension: 6.5*6.5*1.6cm 
Color: black-green and black-black
100% waterproof 
With a 12V 23A battery