"Love having these and being able to see when my tyres get low since I don’t have a sensor! I can just look to see which one is no longer green and I know it’s the one I need to fill up. Saves me so much time."

These caps are simple to put on valves.The green colour stands out very well. I have an older car (2011)...it does have tyre sensors and a warning light on my dash, but the vehicle does not tell you what tire pressures the tyres are at or which tyre may have low air. So, these are a great addition to the old technology of my vehicle...the caps will clearly show you which one may be low or which may have a bad sensor to help narrow the question of which (tyre) down I have yet to see low pressure...But, as far as seeing tyres filled (Green) they work great

Very easy to see if the tyre is full. I have pressure sensors and my car tells me the exact air pressure of all 5 (including spare) tyres. Recently one tyre was low. Unfortunately I could not easily tell which tyre was low. These solve that problem. Also great for older cars with no tire pressure monitoring systems.

I'm someone who walks around my car and looks to ensure things are in place before going for a long drive. My car will tell me if my tyres are low but only when it's below a certain amount that I'm not comfortable with. With these, I'm able to walk to the car and see the green caps really easily. It save's me so much time. I think it's great!

New cars have on dashboard tyre monitor for tyre air pressure. My car is newer but not that new. It has always been hard for me to keep an eye on tyre pressure. This item does it for you. Its the next best thing. You screw it on like a tyre valve cap. If your tyre pressure is good, its green. When it gets low it goes yellow. When it's bad it goes red. All you need to do is walk around your car & look at the valves every now & then. ...it is easy !!

I bought these for my wife's car that has a slow leak on the left rear tyre. They stick out enough you can see them in the mirror, so as long as she only sees green she doesn't have to worry about stopping and refilling the tyre. It's peace of mind for her! After thinking about it, I'll put them on my trailer tyres too. Those things notoriously are low, but not often noticeable without a load on the trailer. This way if I see red or orange anytime I'm outside I'll be able to refill them.

These tyre caps are very interesting. I just came across them one day and thought these would be great for my sons' and my daughters' cars. They are forever "misplacing" their tyre pressure guages, so they're lazy and don't check their tyre pressure. I'm always worried they're going to ruin their tyres or have tyre problems on the motorway, because of their laziness. LOL!! This has solved that issue. It's super easy to check their tyre pressure. You just lean over and look at the colour. They're super easy to install and they're working just as described.