transmitter and receiver system

Hello,

I would like to find a company that could design and produce a system with the following requirements:

The system includes a transmitter and a receiver.
- The transmitter collects and sends data wirelessly from a sensor to the receiver
- The receiver consists of a keypad to enter a value from 100 to 3000, a processor which subtracts this value from the data collected from the transmitter and a display to demonstrate the result.

I would be grateful if someone could help me

What's the range? What's this for?

The system displays the remaining distance -it subtracts the value (100-3000 cm) in the memory from the data collected- from the sensor to an object.
The distance between the transmitter and the receiver is 100 meters.