Properly inflate your tire using this universal tire pressure indicator valve! This watch cover provides a stable accurate tire pressure reading that visually warns whether it is safe or under-inflated. It will automatically display a noticeable color that effectively shows the condition of your tire. Red if 25% lower than standard pressure, yellow if 10% lower and green when tire pressure is normal. It allows you to easily check the condition of your tire at a glance to prevent punctures, rapid tire wear and accidents. The Car Tire Pressure Monitor offers an airtight sealing ring with increased slip resistance. It prevents it from leaking and falling even when driving through bumpy roads and rainy weather. Attach the watch cap to your vehicle's tire valve, tighten and you're done! Suitable for cars, motorcycles, bicycles, golf carts, minivans, vans, SUVs and many more possibilities. Easily monitor your tire condition with this universal tire pressure indicator valve! FEATURES: OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.