Big Dragonfly Pack of 4 LED Automatic Tyre Wheel Tire Valve Cap Light for Car Bike Bicycle Motorbicycle (Green)

Not well made at all. Led unit sits crooked in plastic bulb case so contact Spring very seldom makes proper contact with batteries. I have tried various methods of alignment but so far nothing seems to work. Last resort is gluing one side carefully so led base will sit upright in plastic bulb case. In the design all it would take is a small inside lip for led base to set on. Also on two of the units the small rubber gasket tore off when unscrewing cap to remove the battery blocker as instructed. If purchased be prepared to be frustrated.

I disliked this product. I got the set of 4 lights. One light bulb works fine. The 2nd light flickers less intense than the first light bulb. The 3rd and 4th light bulb is NOT working at all. If this product was sold in an Auto Store in the United States it would receive so many customer complaints that the product would disappear and not be sold. This product does not have reliable quality, and even if I paid $10 for it or whatever the cheap price was, I expect it to work and it doesn't. I removed the bulbs from my wheels on my car. Sorry

I received promptly from Amazon. Only 3 of the 4 LED lights worked. I tried switching in new batteries but it still didn’ Work.The mainfucturer did provide 6 LED lights and extra batteries that were not shown as included on initial purchase. One of the additional lights worked. So I do now have 4 working lights.I will update review after I see if they last for a reasonable length of time.

They were delivered, I put the batteries in (you have to carefully stack them in a rubber sleeve) and they worked. Great! Until I actually put them on a valve stem. Don't know what happens but when you screw them on all the way they stopped working. Best I can figure is the valve stem threads into the product & pushes the batteries off their seat & no connection. Tried a few things but no deal. I guess you get what you pay for. Save your money on this one.

I agree with other reviewers that you do get what u pay for. 8$ for 4 lights is cheap. Therefore the product is cheaply made. Wholly made of plastic I would disagree with the product description that these are waterproof. The quality is such that I would only put these on a child's bicycle at best. The quality is what I'd grade as a C- at best. Batteries shipped had corrosion inside two of the lights. One of the four lights was significantly less bright than the other three. I would not recommend this product to anyone. Product is cheaply made. Packaging was cheaply done. Batteries were substandard (others were shipped with the product that were in good condition). Also, the product only flashes intermittently. They do NOT stay lit in a steady state. Buyer beware. They will most likely be in the garbage can after one or two uses.

Ordered 4.but seller sent 6....... That should have been a red flag right there upon removing them from the package only two of the six worked on the first day and within 24 hours all six did not work. Probably could have found a better made product at the dollar store. Save your money and do not buy this product

These things are so kewl. I ordered 4 and they sent me 6 and a bunch of batteries. sometimes they activate by motion sometimes by vibration. I bought then for my barstool racer and I love them.

Bought two sets. One set, i couldnt even open the vavle to adjust the battery. I emailed the guy in advance so i wouldnt get defective products. That's why I ordered two. Also, come to find that they are illegal in California. Useless waste of money. Check with CHP