ROCKBROS Bike Tail Light, Rechargeable Bicycle Taillight, Auto On Off Sensor IPX6 Waterproof Bike Rear Lights for Night Riding and Bicycle Safety, 4 Light Modes Cycling Safety Light

An outstanding addition to the back of the bike seat. And, it does act like a brake light when you slow down.....very nice how they designed that portion of it....at least I checked it a few times and it worked but kind of hard to monitor when facing the other way. I really like this light....has not failed me and has an excellent battery life.

The instructions using the rubber bands (hair ties, lol) is not explained well, so it took a second. However that said, this is a great little light. Not super duper bright but I love the features and the longevity.

The brake sensing works however it's fairly sensitive. It doesn't seem to be an accelerometer, it lights up very easily when you tilt it forward. Better to be too sensitive than not, I haven't personally written behind it to see how it functions going down the road but I would imagine on a trail or off-road it might signal breaking even when you're not. It comes with two mounts but I can't figure out how to get the one installed. The underseat mount is very solid, on a mountain bike that gets bounced around and hasn't gone anywhere.

Me encanta el diseño y muy buen producto

Easy to charge and setup, small and compact form factor, many bright and flashing modes to aid in being seen. Love the accelerometer that brightens the light when you slow down- amazing value .