Product description 1. [Anti-Theft Tire Pressure Alert Cap]: Visually reminds you when tire pressure is low. Tire pressure detection cap 2. [Smart Tire Pressure Monitoring Design] - Visually reminds the green/yellow/red system indicates the correct tire inflation level. Tire pressure is displayed by identification color. 3. [Installation and Note]: Easy to install. When removing a plug. Make sure you don’t lose the black disk. They tend to fall off and are very hard to find. It is advisable to remove them before your car is serviced in a workshop. 4. [Usage Note]: Suitable for cars, cars, vehicles, SUVs, bicycles and bicycles, trucks, motorcycles, etc. When the lid is removed. After unpacking, make sure you don’t lose the black gasket. They are easy to drop and hard to find. It is recommended to remove the car before repairing it in the garage 5. [Easy Installation]: They are very easy to install, just like a typical cover. Use the wrench to fix the nut in the opposite direction,