2.4 GHz

The most important requirement for any transmitter is to maintain a rock solid connection with the receiver. FrSky is well known for its frequency hopping ACCST technology, which takes advantage of the entire 2.4GHz band, resulting in excellent range and reliability.
Many things can affect the link between the Transmitter and receiver, so FrSky incorporate RSSI (receiver signal strength indication) into all telemetry receivers. This feature allows the Taranis transmitter to continually monitor the reception quality at the aircraft, and raise an alert before signal quality becomes critical.