Parts List: 1 x Digital Pressure Dial Gauge (with Reinforced Quick Clamp) 1 x Screw Type Inflatable Nozzle 1 x USA Standard Air Nozzle 1 x 90?a Extension Inflatable Nozzle 4 x Tire Valve 1 x Valve Core Opening Tool 1 x SealingTape 1 x Reinforced Quick Clamp Spare Gasket 1 x Instruction Manual Product Name: Tire Inflator with Pressure Gauge Key Features: 1. Advanced Accuracy: Professionally calibrated to always return accurate readings within 1% of the exact tire pressure. 2. Reliable Helper: Measuring range: 3?«200PSI/14BAR/14Kgf/cm^2. There are 4 units can switch PSI, KPa, Bar, Kgf/cm^2. 3. Working voltage: DC3.1V (with a pair of 1.5V AAA batteries, without batteries) is replaceable. When the battery voltage is lower than 2.5V, the LCD battery symbol flashes. How to Use: 1. Unscrew the knot of the tire valve. 2. fix the brass end of the pressure gauge on the valve 3. this device will display the pressure 4. When the air pressure is low or air pressure is low, you need to find an inflator pump a