The GPS Module 2.0 installs easily inside the waterproof Telemetry Expander Module 2.0 (sold separately) The Traxxas Link App automatically recognizes the sensor with no other programming or setup required. Once the GPS module is installed, the speedometer reverts to GPS speed instead of estimating the MPH based on gearing and motor RPM. No need to reset any electronics, just select your preferred gauge and start receiving accurate speed data through your Traxxas Link App.