This does not make sense....
All Eggfinders have a GPS module. This does the receiving of the GPS satellites and calculates the 3D coordinates and outputs results in NMEA text strings.
Next is the RF (radio) link from the airborne Eggfinder to the Ground station (the LCD Reciever). there are two Options:
1- 915MHz no license band
2- 70cm (435MHz) Ham Radio band requiring a license.
Both of these work the same as to using the LCD Receiver. Only difference is the 70cm Ham version has a greater range (may be desired if flying very, very high and expect landing miles away).
Other options are in the LCD Receiver box. These are:
1- BlueTooth RF module to send the GPS NMEA strings to a smart phone or Laptop.
2- Another GPS module to locate the LCD box and show arrow and bearing from LCD Receiver to the rocket.
3- A Voice module for the LCD Receiver (could be handy if need to drive to landing location).
Then there is a simple 915MHz RX with a serial USB cable to send NMEA stings to a laptop.
With this RX the Laptop must run software to show rockets location on a map and/or display the Lat & Long.
All this is here:
https://eggtimerrocketry.com/home/eggfinder-gps-tracking-system/