The system is widely used in service area. It consist of table for guest use and signal receiver  for waiter or waitress use. When the guest needs any service, he or she just press the near him or her, his or her desk number will showing on the watch pager with alert music or sound. So the waiters could offer service very timely.
A complete system consist of call bell for guest use, and signal receiver for waiters use. 

There are two kinds of transmitter;

1. Transmitters with single call
2. Transmitters with 3 call s (service, bill, cancel)and 5 call s(Order, drink, service, bill, cancel)
There are two kinds of receiver:
1. Display Receiver, 4 kinds of them.

1) Displya shows 1 group of two digital number,,it can match single call
2) Displya shows 1 group of two digital number,, it can match single call
3) Display show different kind of service,,  it can match with multi-fucntion s.
4) Display show three groups of two digital numbers. it can match single call

2. Watch Receiver , it can support all the s. Single call and multi-functional s.

This system could be used in many kinds of place, such as restaurant, hospital, hotel,coffee shop, teahouse, cafe,bathing center.... In a word, any place that waiters and waitress serve customers will need such kind of product.