Pro Accuracy: AstroAI Pro tire pressure gauge is professionally certified ANSI B40.7 Grade 2A, with an accuracy of ±1PSI. Each tire gauge undergoes rigorous performance testing to ensure unparalleled accuracy Super Compatibility: 3-250PSI ultra-large measurement range meets a variety of needs. Strong environmental adaptability enables it to be used normally in -10℃ to 50℃ (14-122℉) environment. This tire pressure gauge is suitable for bicycles, cars, SUVs, trucks, buses, motorcycles, engineering vehicles, industrial special vehicles, etc Easy to Use: 13-inch rubber hose and 360° rotatable brass air nozzle provide excellent sealing performance and connect more conveniently. AstroAI tire pressure gauge is equipped with a brass deflation valve, which combines measurement and deflation functions to release excess pressure easily and instantly. PSI, Bar, KPA, and Kgf/cm four measurement units can be switched at will Intelligent Screen Precision Display: The tire pressure gauge uses a high-resolution display screen for clear readings, and the white LED backlight design makes it easy to read data even in dim conditions. Equipped with a power display, the reading is automatically reset after 15 seconds and automatically shuts down after 30 seconds to save power Strong & Reliable: High-quality brass and shockproof gear-type silicone protective cover to prevent damage caused by falling and impact. Use the 13-inch rubber hose, strong and wear-resistant, which extends service life Complete Accessories: Equipped with Presta-to-Schrader nozzle, valve core caps, valve cores, and other accessories. Comes with a diagonal checkered drawstring storage bag for easy storage, enhancing the customer experience AstroAI Pro tire pressure gauge is professionally certified ANSI B40.7 Grade 2A, with an accuracy of ±1PSI. 13-inch rubber hose and 360° rotatable brass air nozzle provide excellent sealing performance and connect more conveniently. Equipped with a power display, the reading is automatically reset after 15 seconds and automatically shuts down after 30 seconds to save power