Neat, a new RRT01. I’ve enjoyed my old one. I got a particularly good 5000K tint, pure white or maybe just a tiny bit below the BBL, with even tint across the beam. It can do anything from 0.000001 lm to about 700 lm, with immediate access to the whole range thanks to the analog ring.
I have a V11R also, but it’s bigger and I don’t like having to flip the light around to switch between the button and the ring. Also, mine is cool white.
The RRT01 is one of the nicer lights I’ve used. The main issue I had with it is that it has no LVP and no battery check function, so I could never tell if my battery was nearly full or nearly empty. I had to use protected cells to avoid cell damage, which meant a ~650 mAh 16340 instead of a ~1150 mAh 18350, and with the variable output and lack of voltage indication, I never had any idea how much runtime to expect.
Aside from that though, very nice light, and I used it as an EDC for quite a while. I wonder if the new version adds LVP or battcheck.