hye folks

what is the Difference Between 900 MHz and 2.4 GHz and 5.8 GHz ?

The longer the radio wave, the greater the range and penetration and delay of the signal. The shorter the wave, the more data it can transmit, but the shorter the range and the less penetrability and travel time delay of the signal. The control channel does not require the transmission of a large amount of data, so 900 MHz and 2.4 GHz are used. There is more data in the video channel,
that's why they use 5.8GHz