Got mine today.
The reflector has some marks, the LED is far from centred.
I tried the rear button and I get a green/red blinking when pressed. When pressed again it stops the blinking.
But the light does not turn on with the main button, not even a sign of life form what is meant to be the battery indicator in the centre of the button. Am I missing something?
So I managed to dismantle a bit and see what the issue was. No idea what it was, but when I put it back together it started working.
But mode 4 and 5 has massive flicker. And it actually doesn’t change mode as its somehow interrupting the mode change, even to turn on and off. Its almost like I have to keep trying until I get the perfect timing where there is no interruption for it to work. The battery level light in the middle of the switch also flickers.
So mode 4 and 5 are completely not possible to use on my light. So I programmed one button as lowest output and the other as highest, and that allows me to exit when stuck on mode 4 and 5.