They work great, my only problem is that the valves pert rude from my wheelchair wheels and the plastic tip breaks off if I get too close of anything if the tip was a flexible plastic it be better, I realize that these are disingenuous more for a bike spoked wheel than a mag wheel such of what I have The ones I tried were multi coloured red, blue, green & yellow. These were just blue which I was OK with.

I would have rated this a ZERO if possible. They didn't work out of the packaging. Inside were corroded on some, and others not. I ordered 4 of these, and the ONE that worked just barely worked. It didn't work on the wheel either, just dimly glowed a tiny bit when shaken violently. Don't buy this, pay more for a quality product.

Ships very quick and very cheap price works very well on bike tires

ne fonctionne pas bien...Allume pas toujours lorsque je roule.Bout et vis en plastique fragile.

The product after the summer stop functionning Already!

Tout est ok

Great little safety feature!

more a novelty than anything, but a good safety feature for those who like to ride at night

okay, however sometimes it lights up and sometime not!