8 Pcs Car Tire Tyre Pressure Monitor Valve Stem Caps 3 Color Eye Alert Tire Sensor Indicator for Car and Bicycle

Seems to be doing their job. No problems.

Really bad went to the car the day after fitting them and the tyres were half flat

Tyre went down with one of them

Look good easy to check

Valve caps are rated for 2.4 bar pressure so a bit high for my vehicle, also unfortunately next morning after fitting had a flat tyre due to valve cap leaking. On the bright side 3 didn't leak.

Just what I wanted

The product sounds and works great, except one major flaw. All 8 leak air so the tired go flat within a few days. I have tried with and without and without these indicator valves the tired do not loose any pressure at all.Highly recommend not buying these at all as clearly not a great product.

I have had these in the past and did not have any problems, but, this time I fitted them to the car and the following morning my neighbour knocked and said "you have 2 Flat Tyres". I went out and fitted my pump and pumped them back up. Fitted these caps back on the wheels and about 2 hours later went out and found they had both lost pressure. So I had to repump them up again. Took all of them off the car and put the original black plastic ones back on. The 2nd set I was going to fit to my mobility scooter, and this is the last thing I wanted to happen so I left them off, they are all relegated to the shed now. Not impressed at all not as good as they used to be. Shame they used to be great idea.