I have very strongly mixed views regarding this tail light. I like the basic concept itself. However, there are many flaws regarding it's functionality. I have several bikes. One of them has an aero style seat post that the tail light does not work on at all. The charge port cover for water proofing does not fit well, so it doesn't completely keep out water. It is impossible to distinguish which luminosity output setting the light is at, so you don't know if the current charge will last for 2 hours or 15 hours. I don't believe the fully charged light's runtime will last 15 hours on any of the settings. The alert seems to be erratic. But if you can look past all of these details which are bothersome to me, then it's an otherwise good light.
Ordered 2,for my and my wife's bicycles to increase visibility and have a stop light feature. Very visible and bright with different flash modes, well made, and the stop light feature works well and is helpful to the rider behind the front rider as well as to vehicles. Glad to have it for all roads shared with traffic...
