This FRX Pro is programmed to transmit telemetry data between Alta X and the operator ground station computer* for long-range communication during waypoint missions.** It is a 900mHz system, rated for operating ranges of 1500m+ (5000'+)**.
Without a long-range radio solution like this FRX Pro (or a pre-installed FRX Pro added when building your Alta X kit), you will not be able to communicate or receive position/telemetry updates from the Alta during waypoint missions. All missions will need to be configured within range of your mobile device, or while plugged into your ground station computer with a USB cable.
It is not necessary for flight operations that don't involve qGroundControl (manual, altitude or GPS mode flights) when flying with a traditional RC radio.