Keten Rear Bike Light, Bike Lights Front and Back Waterproof LED USB Rechargeable, Red Blue COB LED Bicycle Tail Light with 6 Lighting Modes for Night Riding Cycling

Great bright light with a few cons. Let me start y by saying you 'WILL' be seen by all road users and pedestrians alike, extremely bright light that puts the costly counterparts to shame. Can be mounted vertically and horizontally. Cons include the rubber strap does not seem robust, the light can be extremely difficult to turn on and their is a lack to them it off without going through the doesn't light cycles by keeping the on of switch depressed for a couple of seconds. I think theirs 6 light cycles that turn from the strobe, full beam, mid, red flas only and a couple more. Usb rechargeable flap cover also is a bit flimsy one must ensure it is seated correctly to prevent water ingress and one must use an appropriate 5v charger that outputs 1 amp or their is a risk of damaging the light or worse. Charges well within a couple of hours. For the price can't be beaten will give other lights priced at three four times the cost a run for the money. If it wasn't for the quality of the strap it would have been 5 stars. Useable on D shaped seat posts. Buy with confidence.

The lamp itself seems well-made, though not so sure about the rubber cover for the USB socket or indeed the rubber attaching fixture. As others have written, the light is very bright - couldn't be better. Instructions are miserable. Thus, when charging, the lamp lights up untilit is fully charged - at least I think so. To switch it on, one has to press the rubber switch really hard - it took me time to appreciate this. And to switch it off, one has to cycle through the six ? different options before reaching "off". A little leaflet tucked inside the box would be so helpful.

This product is phenomenal. It exceeds all expectations. Not only is it bright, but it has six different modes as well as a blue light feature. I couldn't give this enough praise. Charges fast.

As everyone, who buys of Amazon should know, there are product reviews and, "product reviews". Unlike others, I can assure you, this is an honest product review.Having had this light for a few months now, I wouldn't buy one again.Like me, you might be attracted by the price, and if you are, you need to realise, this light is not built to last. At £8 (or whatever it's going for now) you might think, "so what, I'll just buy another one". That's fair enough, if you're not interested in the environmental impact replacing stuff like this has on the world.If it wasn't for the way this light has been designed, to fit the rubber attachment strap, I'd probably be a bit more positive towards it. The light, itself, is bright and does offers quite a few lighting options.The major flaw, as I see it, is oval fitting on the rear of this light. Unlike all my other lights, which slide into a rectangular attachment fitting (and are interchangeable), this light has an oval fitting on the back (which makes it incompatible with every other strap I possess). The problem with this is, after removing the light from your bike a few times, to charge it etc, you'll find this fitting becomes lose and, in my case, leads to the light pointing down, rather than at the traffic behind. And being oval, it's hard to find a workaround for this problem, (which is why I gave up on this light just a few weeks after receiving it).Others, have highlighted the issue with the rubber strap, but none, of the reviews I've read, have mentioned the fitting on the back of the light itself. You may have read these reviews and thought, "if the strap does breaks, I can use one of my spare ones", which is why I've highlighted this issue.The more you know, the better.

I was extremely disappointed with this back light - It just stopped working after a very short time.It seems to charge up but when I switch it on - it switches off after less than 5 minutes.Not very useful if I am out cycling in the dark. I didn't realised it had happened - so potentially could have been very dangerous as I was on an unlit road cycling when it happened.

The first thing that happened was the on off switch rubber fell out had to make a new one, I would buy this product again, good rear light, the manufacturer needs to sort out the on off switch.

After only a few uses. Maybe I have a 'dodgy' one but that's not much consolation to me

Great little light!! Very very bright. You can't fail to be seen on the road. It has various settings - flashes blue and/or red, constant or intermittent. Been out in the rain with no issues. I've only used it for 4 hours continuous use in flashing mode but potentially could last a lot longer. I daren't risk longer in case I get caught out in the dark. The attachment strap is made of stretchy rubber which should fit any size seat post. Great little light for the price.I would definitely recommend.