I will only write about the front LED.
I have had this product for 7 months and from the first week, I have been looking for another one!!! (subjective)

Now objectively:
a. It needs charging every 4 hours of cycling.
b. After you see the red indicator, it goes off in 15 minutes.
c. It does not flash. 2 modes, Medium and High.
d. Even the High mode is not sufficient to light up the road but to make you visible..
My conclusion: a good solution as a backup.

The light is powerful, but it lacks a blinking function, it simply has a small and large scale on the front. On the small scale, it lasts for 3 hours, on the back for 3.5 hours.