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 Number display

Software Device 
1.With high strength ABS material cover
2.Insert to USB port of the PC to work via management software
3.Manage all calling info by PC, it also can show the calling number by itself
4.Easy to read service type from PC

5.Read service type from screen directly by red dot                                        

6 Show 3-digit number 001-999, First digit can be alphabet ABCDEFHLUPO, work with 999pcs call buttons in max
7 It can show different service type by dot or last alphabet 
8.Touch screen    
9.Dimension: 282*150*34mm
10 Output: DC12V

7 segment display need work with wireless transmitter