I would think it is more about the surrounding radio noise also. With a rural setting containing hardly any other Zwave the tested range indicates IMHO to about 20-30m in a city environment with so many cell phones, PS adapters, WiFi and electric motors putting out RFI.Oh, I am sure that you can get a mile with mains power and no exterior walls in the desert or the flattest part of Kansas. Which are both real and in the world, so "real world"
Getting 2x or more the range on battery devices and a quarter mile for powered devices like gates is a pretty nice upgrade, assuming battery life doesn't take a huge hit.
I would think it is more about the surrounding radio noise also. With a rural setting containing hardly any other Zwave the tested range indicates IMHO to about 20-30m in a city environment with so many cell phones, PS adapters, WiFi and electric motors putting out RFI.
Never going to happen in a battery operated device using that much energy to transmit.
Many people in the UDI forum use a USB extension with a higher elevation mount for the HA RF dongles for better results than plugged into the back of a metal box shoved in a drywall or concrete corner.