I finally got to go riding today after a couple days of rain. My RTL 510 radar tailight bundle worked flawlessly.
I was a bit concerned as I mounted it on the right side of my rear wheel on a luggage pannier support, whether that might compromise its sensivity or accuracy. It also tended to not be exactly vertical, but slanting downward maybe 10 or 15 degrees from vertical. If I had mounted it on the left side of the wheel, it would have been pretty close to the deraileur and the drive gears.
Despite these concerns, it worked flawlessly, detecting cars before I could see them in my rear view mirror, and rendering them on my display until they passed me on my left. The display was very bright and easy to see and interpret in bright sunlight. Cars were detected at least 200 yards or more behind me.
The head unit is smart too - it does not render or display cars that have passed me in the opposing lane and are driving away from me, NOR does it render vehicles crossing the road behind me at distances where it clearly sees cars approaching me. In other words, the display is "smart" and ONLY displays car/vehicles approaching me from behind me. So I don't have to interpret other false positives, Cool!
Chris asked if it will detect vehicles two lanes over behind me as they approach on a 4 lane highway - while I did not actually evaluate this, the device was so sensitive and so precise, I am pretty certain it will detect cars two lanes to your left as you ride in the shoulder of the road. It certainly renders cars until they actually depart in front of you, so it sees them when they are directly beside you.
I also had some concerns with the security of the mounts, but over a 30 mile ride today, they seemed to work flawlessly also. So good news all around!
Go Garmin!! 👍🏻