3 in 1 multifunctional and easy to use: This is a pressure gauge for accurate monitoring of tire pressure. It is also a tire inflator for inflating tires when you connect an air compressor. In addition, it has a built-in valve that quickly reduces pressure in over-inflated tires. High precision: Professionally calibrated to always get a reading within 1% of your exact tire pressure and 0.1 on the display. No more surprises! Measures accurately from 0 to 250 PSI (0-17.2 bar; 0-1724 kpa; 0-17.5 kgf / cm) WATERPROOF SHUT-OFF AND VALVE EXTENSION: The quick-locking air line (push-fit gas interface) provides an excellent seal of the tire valve outside the car tire and frees your hands to operate the tire inflator. Long lifespan: Made of high-quality and robust stainless steel and brass components to ensure a very long lifespan. 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 save battery life. Integrated valve for quick pressure reduction in over-inflated tires. Product description High-quality construction The first thing you will notice about this gauge is its weight. Only high-quality stainless steel and brass were used to provide an extremely robust level gauge that can withstand up to 250 PSI. The rubber hose is insulated and extra thick for superior performance. HIGH PRECISION 250PSI TIRE INFLATION INDICATOR Measuring range: 0-250PSI Accuracy: (1% + 0.1 PSI) Four ranges: PSI, BAR, KPA, KG / CM ^ 2 Button functions: On / Off button (left), switch button / LED (right) Compatibility: 1/4 \" NPT air compressor connection (included) Operating voltage: DC 3.1 V (2 AAA batteries included) How to use: 1. Unscrew the valve hub from the tire. 2. Attach the gauge's copper head to the valve 3. The unit displays the pressure. 4. You need to find an inflatable gas pump and hose to connect the inflation nozzle and hold the product by the handle. Inflate it through the inflator when the pressure is low or vice versa. 5. Unscrew the copper head after measurement and press the air outlet so that the display shows 0. All suitable accessories: 4 x valve caps 1 x brass air mandrel 2 x AAA batteries 1 x \" NPT steel coupling 1 x roll of sealing tape 1 x pneumatic rotated chuck 2 x sealing washers O