USB Rechargeable Bike Tail Light, Waterproof Bicycle LED Rear Light, 5 Flashing & Constant Modes with 2 Colors

I ordered two Red/White LED taillights, which I received in about a week. The first taillight turned on immediately. The second wouldn't turn on, and presumably needed to be charged.The taillights are nicely manufactured, and bigger than I anticipated. The dimensions are L = 4.0 in. W = 0.7 in, and H = 1.1 in, with H = 1.3 in that includes the attachment foot. There are 10 Red and 10 White LED lamps that are mounted on a 3.4-inch-long lighting strip. The patterns of lights that are sequentially switched are as follows: (1) steady Red, (2) steady White, (3) fast blinking Red lights, (4) the SOS flashed in Red, and (5) strobing Red LEDs alternating with strobing White LEDs. Additionally, the plasticized rubber mounting bands I received are thicker than all others that I had previously received that accompanied other lights, and which I viewed as a sign of quality. The USB charging cord provided is 9 inches long and sturdier than most.I charged both taillights. The second light tried to turn on for a moment, and then died completely. After a full charge, I placed the first taillight on steady RED mode. It burned brightly for almost five hours before dimming to the point where it was not usable. Five hours! Excellent!The alternating Red and White strobing lights are exceptionally bold and bright and command attention. While a single taillight helps make a bicycle visible, used in pairs or in addition to other lights, these taillights compel drivers to take notice. Safety is all about being seen early on and from a distance. And the degree of safety that can be achieved is directly proportional to the number and brightness of the lights that are strategically positioned and that can be seen from the front, sides, and rear of the bike. These taillights can help one to be seen and to arrive home safely at the end of the day - or night.The trouble is that out of two taillights ordered, one works brilliantly, and the other one failed on arrival. So, I am having a difficult time offering a recommendation. My preference was to reach out and contact the seller to resolve the problem prior to writing this review. But there is no apparent way for me to contact or message the seller directly. I would never recommend a product that would compromise someone's physical safety. But if you purchase this item, you may be putting your wallet at risk.In summary, one taillight was exceptional and exceeded my expectations. The second had a flicker of life as I watched it die before my eyes. I could just return them and ask for a refund. However, I liked the way the good taillight functioned, and would prefer that the non-functioning one be replaced. I will wait to see if the seller is responsive to this review.Follow Up:The seller contacted me via Amazon. He offered a refund, but I asked for a replacement, and it arrived in several days. It worked perfectly. So for the past two months I have been using both lights, attached to my rear cargo rack. They are very bright and visible in daylight. I often ride at night, and there is no question that I can be seen from blocks away. I am very pleased with these lights and with the customer service from a responsible seller that stands behind his product. And that allows me to change my rating to a full five stars, and to recommend these bicycle lights from this seller without hesitation.

I bought it for my bicycle but haven't used it on there yet.

Good price point and nice and bright but don’t push it on the waterproof part cover wit a baggy or something when no one use to prolong life.

I purchased this for my E bike. Easy install super bright. Very strong purchase for the money.

It WAS a Great Light -It WAS Bright & held a charge for many rides- 🚲Now its a Piece of TRASH that I have to RecycleThe recharge plug on light Broke off After about 10 rides-and the plug is Now rattling around in the light 😡I Hope the Seller Sends me a New one - Then I'll Update my review

The red/white version has a clear lens, as shown in my picture, not a red lens, as Amazon has it. The light is amazingly bright, and solid white mode could even be used as a headlight for some purposes, at least for a kids' bike. The one thing I really don't like is that slow flash mode (red) is an SOS pattern (3 short, 3 long, 3 short) -- not a good message to broadcast as you're just cruising around town or down a solitary bike path. And that's the only slow flash mode it has. I would not buy this one again -- I would recommend the other kind with a solid red lens, which have steady mode in three levels of brightness, and flashing at three different speeds (no SOS!).

The light works very good. Brightness is awesome and you can use both in front and back of the bicycle.

Love the flashing, but not so much with just red the blue light, should have white light also in the sequence