Yinch LED Bike Wheel Lights 4 Pack - Waterproof Valve Stem Cap Lights for Bicycle Motorcycle Tyre Spoke, Flash Lights with 10 Extra Batteries (Green) - Perfect for Night Riding, Kids Safety, and Outdoor Cycling Adventures

These were not very expensive so don’t expect the world out of them. You get what you pay for they did work just fine and they did include a few extra batteries.Fair purchaseFor the price it’s great got many compliments on them came with extra bulbs too but people kept stealing them so I need to get ones that have anti theft on them ?overall it was good not as bright as how they advertise it to be.First thing!!! These are awesome they work by motion sensing and darkness. During they day they stay off. At night they automatically turn on when they sense motion. For such a little tiny light it is packed with tech that should be more expensive. Also comes with extra batteries that last a long time.Works Intermittently. They will light up if you walk near the bike & car, or even just switch the light on in the garage (where the bike & car are parked) Replacing batteries is frequent and annoying. You have to mess with the button batteries (3 in each light) & constantly adjust the contact wire at the screw on area, to get them to work at all.It's coolPurchased this product and some of the lights didn’t work properly. Once the air leaked out of my tires. Not sure if that was a error on my part or not but once I took them off I haven't had an issue at all. Not very well made at all. The overall idea of them is nice and if and when they work properly look nice.These lights have a blink-flicker rather than a static “on” like I was looking for. Reminds me of light flickering that would be on a police car. If that’s what you’re looking for then this is for you, but if you were wanting a static “on” light then look elsewhere.