3 in 1 Multi-Function & Easy to Use: It is a tire pressure gauge to accurately monitor tire pressure; It is also a tire inflator to inflate tires when connecting an air compressor. In addition, it has a built-in air bleeder valve that quickly decreases the pressure of over-inflated tires. High Accuracy: Professionally calibrated to always give you a reading within 1% of your exact tire pressure and 0.1 in display. No more surprises! Accurately measures from 0 to 250 PSI (0-17.2 Bar; 0-1724 Kpa; 0-17.5 kgf / cm²) SEALED AIR CHUCK & VALVE EXTENDER: Quick-lock air chuck (socket-type gas interface) provides excellent sealing on the tire valve outside the car tire and frees your hands to operate the tire pump. Long service life: Made of high quality and sturdy stainless steel and brass components to provide a very long service life. Can be used with all vehicles, such as car, SUV, truck, motorcycle, bicycle, etc. Easy to use: Automatically turns on and off after 20 seconds of inactivity to