Excellent bike rear light. Really powerful, but five different brightness levels help you find the right brightness. In addition, the automatic adjustment of the amount of light according to the amount of ambient light really works - I don't know about the brake light.
A good addition is the available additional brackets (saddle bracket and backpack clip). A small downside is that the product does not have an easy-to-use battery level indicator.
I highly recommend.
Thank you for the red light.