Ultra Bright Smart Bicycle Tail Light,USB Rechargeable, Auto On/Off Brake Sensing Bike Taillights,IPX6 Waterproof Bicycle Rear Lights,Back Red LED Light for Mountain Bike Accessories

Great shape, look and functions. Sensor working good too. When slow down/breaking it goes brighter. My version goes under saddle only. I couldn't mount it on post so contacted seller to ask for attachment to do so.they sent me another version off charge so I could put it on seat post. Amazing customer service. So is the item. Bright. Visible. Adds a lot to overal look of the bike.!!

No issues does what it is supposed to do.

Nice little light, pretty good but the only couple of things I have issue is the way you need to screw it as not really smooth and also in few occasions switches itself off for no reason and for sure battery was fully charged.

It's quite bright and it looks clean on my bike.Really happy with it. The Brake light works.Although I'm not sure how it responds to bumps since I can't see what's happening behind me.but Overall a really good taillight.

Honest review, from a cross country mountain biker.Not sure if this product ever actually worked for me. It had a life of its own and has now been resigned to the spare parts bag. Sometimes it would be on, sometimes off. According to my riding buddies, the break function never worked, so can’t understand all the glowing reviews (be interested to see if this negative one makes the website). Concept great, but no use if it doesn’t work in real-life.Avoid and buy quality. Definitely worth the extra investment.

This light has cable ties to secure it to frame, looks like a nice light but poor quality attachments, for the money would expect a higher quality band or strap

what is to dislike, I bought these lights for my husband as he's been clipped twice by car drivers saying they don't see him even though he did have lights, he challenges anyone to miss him now

Its a very good light that acts like a brake light.its very bright and does a great job.

Muy buen producto

I was skeptical at first as you see a lot of different ones that look like this. This is by far the brightest tail light I have ever used. installation was easy. You might think it would be bad using the zip ties included, but it worked well for the space I had under my seat. The breaking aspect works well. Best part is it looks really cool.Definitely give it a try if you are on the fence about it.

First time I saw a similar product advertised was on FB. And with FB ads, I usually have a load of skeptism towards them because fulfillment is usually an issue and the comments sections, if you dig past the fake positives, is usually littered with unhappy customers who never received the product. So when I saw this product on Amazon, I was also skeptical but was assured that it's at least on Amazon and I'll most likely receive the product at least.The product arrived as quickly as anyone in CONUS can expect (2-3days) and I was immediately impressed. The housing of the lights and mount is made of anodized aluminum and feel rock solid. Buttons have a nice tactile feel to them. The packaging wasn't anything impressive but I don't care about something that's going in the bin. It provided several ways to mount the light, primarily seat post and saddle rails. I preferred saddle rails as I usually carry my spare in cycling jersey and I like the high position of the light, which makes it more visible.Battery life on the light is sufficiently long for my purposes, although I haven't done long rides at night to find out. What I could say is I can go several rides before I have to charge it. It would be nice to have some kind of battery indication. I do find myself reaching for the charger regardless of how much battery is left, which is not great for batteries.The light has several modes that you can cycle through with the single switch in the front. There's also a toggle switch in the back from "Auto" to "Manual." I've never been too sure what it really means; I think it's controls Auto/Manual on-off by motion sensor. I've left it in manual so the light doesn't turn on as I move about the apartment. When I ride, I can just toggle it to <Auto>, screw it onto the bike and let it do its thing.The light itself has three modes: constant, flashing, and pulsing. Each mode is what the light looks like when there is no acceleration in any direction (deceleration is also a type of acceleration in the world of physics). When acceleration or deceleration is detected, the light immediately turns solid + bright to act like a brake light. The accelerometer is very sensitive and will be very effective to indicate your change of speed. When riding solo on the road, this will be invaluable in informing drivers and other rides what's going on with my bike. I can also see this light being very helpful for group rides as it helps to get the riders behind's attention. Only potential downside is if it's *too* sensitives and anytime I back off the pedal it lights up as if i'm jamming on the brakes, which could take a bit of getting used to. I haven't taken this on a large MAMIL group ride so I don't know. Whenever I get opportunity to do that I and get some feedbacks, I will come back and update the review. That shouldn't stop you from buying this light though, imo. It's an amazing product and worth every penny.Now, let's talk customer service.I liked these lights so much I actually bought two. And a few weeks ago, however, I realized I had misplaced the saddle rail mount. I might've thrown it out along with my old broken saddle carelessly or whatever. I dug up my Amazon order from almost 6 mo ago and emailed the seller asking if they could sell me a spare part - after all it was my fault I lost this. The seller got back to me within 24h and *offered* to send me a brand new product for free! No questions asked! Where do you find customer service like this?! These Chinese sellers are so amazing I'm completely floored. We're talking about a $20 bike light, not a $50k Rolex with super high margins... This is just unparalleled and makes me feel like there's never been a better time to be a consumer.If you're in the market for a bike light and you think this might suit your need, take a punt with $20 and go for it. You won't be disappointed. And even if you are, it's $20 bucks and if you really want it back, I'm sure you can get a refund. It's a damn good product from a damn good seller. Best of Amazon.

Vélotafeur depuis prés de 3 ans, j'ai cet éclairage arrière depuis 1 ans. C'est un produit de qualité, avec des matériaux de qualité, solide et utile. Je ne mets jamais 5 étoiles mais là il faut avouer qu'il fait le taf. Je fais 20 km mini par jour et je ne le recharge qu'une fois par semaine. Il faut trouver le bon réglage et après on n'y touche que pour le recharger. Le feu stop automatique est très utile et il détecte la luminosité pour se mettre en mode nuit (feu rouge clignotant actif). La fixation sous la selle est solide, le feu se visse au support (très pratique).Bref excellent produit je recommande.

Leí varias opiniones contradictorias, pero mi experiencia es que funciona muy bien. Mi problema es que siempre olvido encender la luz trasera. Con este modelo ya no me pasa, la pogo en modo automático y se enciende sola cuando me monto en la bicicleta, luego también se apaga sola cuando no nota movimiento. Sólo por eso ya me merece la pena. Luego, tiene bastante luz y se ve bien tanto de día como de noche y además queda muy bien encajada en los railes del sillín así que no molesta nada.