Instruction: Tire pressure measuring when car is in unused status. Turn on the gadget by push "on" button LCD will display "0.0". Direct the air faucet to tire air valve and press in. Make sure no air leakage .Hold the position until get stable value on LCD . The value measured will be kept for 90seconds, then disappear automatically Push "on" for 3seconds to turn off . 4 types of pressure unit：PSI BAR and KPa KG/CM2 which can be changed by pushing ON button. Slip switch to turn on LED light and flashlight Specification： Temperature measurement range：30 to 122 degree Fahrenheit（0 to 50 degree celsius） Pressure measurements range：2 to 150PSI Accuracy：±1PSI Battery： flashlight, LED light and LCD backlight: AAA battety *2 Package include: 1x Digital Tire Gauge Emergency Tool 1x User Instruction
