Restaurant guest paging system

Restaurant guest pager system is mainly used in fast food restaurant, self-service restaurant, clinic, hospital, tea house, office and so on, where there are a lot of customers waiting for their service. The system is consist of a Keypad Transmitter for the caller and a Pager Receiver for the one who will be called. When the caller is ready to offer service, they can press the corresponding number on the keypad to send an ID to the pager. And the people holding the pager will know the information that the dishes or service are ready to be offered and take it at earlier time.

Specification of pager KTP20 digit show on the top

One set include 1 keyboard and 20 pagers
---Keypad Transmitter---
Can show 3-digit number 
Can work with 999pcs pagers in max
Size: 28.5*15.3*3.6cm
Color: Black
Output: DC7.5V
---Pager Receiver---
Shell Material: High-quality polycarbonate
Power: Built-in 3.7V polymer lithium battery
Pager size: 10.5*5*1.7cm---Top
Pager size: 10.5*5*1cm---Front
Prompt mode: Sound, Vibration, Flicker 
Color: Dark red
Low power Prompt: Yes, will show "LLL"
Can hang on the neck