Review on 🚗 Enhance Road Safety with KURAMI Car Tire Pressure Monitor Valve Stem Caps: Eye-catching 3 Color Indicator, Set of 4Pcs by Robert Xayamonty

I screwed one of these onto the valve stem and immediately heard a hiss. The sound of air escaping from the lid. Not the best product in practice; Really smart in theory to be able to visually see if your tires are low on air. If I bought it for my car I'd probably give it a good shake, but on my wife's car I can't roll for an avoidable flat tire with a device designed to tell you if your tire is flat. .Edit: I was contacted by their support team and said that their last batch was poor quality and that they had gone to another manufacturer. Willing to replace my order with a better set to try; let's see if there is a difference. At least they care enough to try and fix things.