Questions tagged [frsky-r9m]

Use in reference to the FrSky R9M receiver compatible with the FrSky R9 long-range RC system.

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Why is 900 MHz better for long range than 2.4 GHz?

There are various transmitter modules like the FrSky R9M system which operate at around 900MHz rather than the more commonly seen 2.4GHz. Why is 900MHz better for long range drones, and why is 2.4GHz ...