Discovered this by mistake after having a couple of disasters and crashing my X8G, there is a way to set the transmitters to low power, possibly without knowing.
I show you examples inthis video of the X8 and X5 transmitter being set into low power. I found in this mode you will only get a max of about 100ft range before your quad will start dropping, if it loses enough signal, your quad will drop to the ground because it will have lost binding with the transmitter.

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