Description: High quality construction The first thing you will notice about this meter is its weight. Only high quality stainless steel and brass were used to provide an extremely rugged 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 areas: 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 copper head of the measuring device to the valve 3. The device displays the pressure. 4. You need to find an inflatable gas pump and hose to connect the inflatable mouthpiece and hold the handle of the product. Inflate it through the inflator when the pressure is low or vice versa. 5. Unscrew the copper head after the measurement and press the air purge 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 fitting 1 x roll of thread sealing tape 1 x pneumatic rotated chuck 2 x sealing washers