product description1.[Anti-theft Tire Alert Pressure Cap ]: visually remind you when the tire pressure is low.tire pressure detection cap2.[Intelligent Tire Pressure Monitoring Design]: visually remind you, the green/yellow/red system indicates the appropriate tire inflation level. The tire pressure is displayed according to the identification color. 3.[Install and Note]: Easy to install. When removing a cap. make sure that you do not lose the black washer. They are inclined to fall out and are very difficult to find again. It is advisable to remove them before your car is serviced at a garage.4.[Note for use]: suitable for automotive,cars,vehicle , SUVs, bike and bicycle, trucks, motorcycles, etc. When the cover is removed. After unpacking, make sure you dont lose the black gasket. They are easy to fall out and hard to find again. It is recommended to remove your car before it is repaired in the garage5.[Easy installation]: They are very simple to install, just like a typical lid. Use the wrench to fix the nut in the opposite direction, which is convenient and easy to use. The product has a long life and can be used for a long time.