New Tech Junkies NTJ (4 Pack) LED Motion Activated Bike Bicycle Wheel Valve Stem Cap Tire Light (Red)

Bought this for my bike, all came with full functionality, and an extra was included for free, problem is they all work the same and they don’t exactly work as pictured, the speed you need to go to get these things to fully light up is above what’s reasonable for a bicycle, and they tell you in instructions that they flicker and light inconsistently unless you can reach that unreachable speed, which isn’t told in the product description when purchasing, very misleading product, however On motorized vehicles this would work better.

They are cool novelty items but really not the best. It works but a few of them would not work if you tighten all the way on your stem valve. You have to take them off every time if not you will just waste the battery during the day. Great for “events”

Similar to other reviewers... One of the four worked as it should, two had to be partially screwed in to operate and one was not functional at all. I was not expecting much from the product and it was cheap enough...

The good: they look amazing and do exactly what they claim.The bad: the batteries only last, at best, a couple hours, and you have to remove them during daylight hours to avoid wasting the little battery life you do do get out of them.

Battery died after 10 minutes of riding, although they did send me and extra one just kinda defeats the purpose when the batteries don't last.

They came apart

They lasted about a week for me(daily driver), nice and bright for night time. Yes, they’re all plastic.

Some showed up broken, looks great for a day or 2 on car, may last a week on the bike, but batteries have 2 be replaced constantly. Some lights brighter than others & cheaply made. Dont bother for a car. For bikes, kids will love em. Order 4 though just in case.