OceanTailer Digital Tire Pressure Gauge with Tire Pressure Monitor Suitable for Tire Gauge Test Available in White and Red LED Flashlight Lifesaving Rescue Tools Included: This Tire Pressure Gauge Multi Tool comes with an emergency seat belt cutter and glass hammer. Use Day or Night: This Digital Tire Pressure Gauge light up the night tool includes both a white and red LED flashlight, so you can work at night or at day. Measure High and Low Pressure: Four Scales pressure up to 150 PSI, KPA & BAR, from measurements as low as 3.0 PSI, Giving you flexibility to check the pressure in the same measurement units that are used by your vehicle manufacturer with Tire Air Pressure Gauge. Easy and Quick Check: Fortunately, you can quickly check the tire pressure and fill your tires before disaster strikes with Digital Tire Pressure Gauge. Accurate Tire Pressure in Seconds: Press the button to turn it on. Simple to use, highly accurate gauge measures pressure in, with this Tire Pressure Gauge and prevent tire BLOWOUTS. White LED flashlight - an LED flashlight that will surely bring a bright light. Blue backlight - a blue backlight that enables you to see the measures even at the dark. LED light switch - the switch for the white and red LED lights. Safety lock button - a safety lock button for the Glass Breaker/ Hammer (4). Glass Hammer - a glass hammer for emergency use of breaking car windows. Screw Driver (-) - a flat head screwdriver. Seatbelt Cutter - a seatbelt cutter in case of emergencies. Pliers - a pliers for gripping small objects and wires. Screw Driver (+) - a phillips head screwdriver. Scissors - a handy scissors. Power Button - On/ Off button, also used to change the unit of measurement. Red LED light - the red LED light that enables you to see the nozzle even in the dark. Tire nozzle - insert the tire nozzle on the car&#039;s air valve. Conduct tire pressure measurement when car is in unused status. Turn on the device tool by pressing the power button, the LCD will display &#034;0.0&#034;. Direct the air faucet to tire air valve and press in, make sure that there are no air leakage. Hold the position until getting a stable value on the LCD. The measured valuewill be kept for 90 seconds. Press the power button for 3 seconds to turn off the device tool. There are 4 types of pressure units: PSI,BAR, KPA, and Kg/Cm which can be changed by pressing the power button.