FrSky ACCESS R9M2019 Long Range Module System

I have been using it for several years and despite my numerous trips a few kilometers away and back on all types of terrain, I have never had any low RSSi alerts.

The auto mode in the remote control settings allows the module to adjust its power according to the signal strength from 25mW to 1W. I recommend it.

On stock firmware, this is 2-star at most. It is essentially the same as 2.4ghz Access/ACCST, just moved to the 900mhz band. As such it only offers a modest improvement on the less than stellar range of the 2.4ghz version; still significantly behind Crossfire. However, if you flash it to ELRS it performs quite well. The only wrinkle is that it cannot beacon a wifi signal for configuration, so you will have to use the ELRS configurator for anything you can't set via the LUA script.