Dkiigame 10 Pack of Led Flash Tyre Wheel Valve Cap Light for Bike Bicycle Motorbicycle Wheel Light Tire (2 x Red, 2 x Yellow, 2 x Blue, 2 x Green, 2 x Colorful)

I was looking for something to help make my night bike rides a little safer, and this is it! I was looking for something simple and didn't require me to remember to turn it on and off. These work great! I installed them on my bike tire valve and they turn on as soon as I start peddling my bike. This is exactly what I was looking for, great value and I get 5 different color lights to switch between depending on how I feel.

Only half of these worked due to dead batteries from the factory. I reviewed the design of the unit to figure out why. They are using the cathode leg of the LED to make contact with the sliver of negative battery exposed on the button cell battery instead of making contact with the rearmost button cell's negative side in the series of batteries. The reason most are showing up dead or half discharged is the bend in the cathode makes contact with both the positive inner portion and negative outer portion of the cell because they used a square piece of paper to insulate them in shipping, and sometimes, only sometimes, the negative leg of the LED makes contact in the tiny area between the square's straight edge and the LR1130 battery's round edge. In short: because they didn't use a round piece of paper as insulation they are eating through batteries in storage. Now, as for the functionality of the unit, there is no timer circuit and the lights only power on when a inertia switch closes the circuit. The issue is the inertia switch is it is just a wire inside a coil inside a white tube. The quality control is not very high so sometimes the coil sticks to the inner wire and the light stays on. Other times the coil never moves enough to touch the inner contact. It's a very erratic light pattern, when it even works. So, in short, these are cheap, they are kind of fun *when* they work, but I would not buy again because the frustrating inconsistency in their functionality. They are disposable and I would not bother even replacing the batteries.

Couple of them didn't work batteries don't last long they're made out of plastic very easy to break

Fits perfectly on my tire. Lights are bright.

These work amazingly they are a great safety addition to any bicycle and work perfectly they are bright enough to see near sundown and look awesome the body and construction is plastic with a chrome coating but are decently sturdy enough for daily use plus there are five pairs for the cost so worth every penny.

They look good but are from China. Somethings from China are good but not everything is good. These are cheaply made and fall apart easily. I do not recommend these. Save your money for better quality stuff...

the shiny chrome plastic piece unscrews in it's center. there is a small square of paper to be removed

I put a couple of these on my eBay and they are impressively bright and beautiful. They work just as described. Love them and can recommend them highly