Dunlop valve, Presta valve are not suitable for this product. connect to the valve to quickly get the precision data. There are 4 units with range: 0-100PSI, 0-6.85Bar, 0-690KPA, 0-7kg/cm, press on/off button to change data unit.Schrader valve only LIGHT LAMP & LIGHTING LED: LED backlight and light nozzle show you the reading data clearly even at night or in the dark when you need to test tire pressure. EASY TO USE: ONE BUTTON. Press "ON/ON/OFF" to turn on the pressure gauge, then choose the units you want and connect it to the valve of the tire you want to test. After use, the device will automatically turn off after 30 seconds to save battery power. Very convenient to carry, you can place it in the center console or hang it in your car. Ergonomic handle design and non-slip surface fit MULTIFUNCTION: Put an end to frustrations at the gas station and check your vehicle's tire pressure yourself Helps maintain normal tire pressure to reduce tire wear and extend tire life. It also improves the fuel efficiency and operating performance of the vehicle to maintain safety and avoid blind speculation before continuing on the road. Suitable for passenger vehicles, motorcycles.