use: It can measure the tire pressure, pumping and lighting of bicycles/cars. The car runs at high speed. In order to prevent the direction from deviating, adjust the four-wheel air pressure to the appropriate pressure and adjust the left and right balance to increase safety and reduce fuel consumption. Feature: Wireless & Portable: The wireless design and compact mini size make the air compressor portable and easy to operate with one hand. The compressor is ready in only 4 steps. An LCD display indicates the air pressure.Suitable for inflating when the car tires are insufficient and Fully inflated the bicycle and motorcycle tires; Inflate Fast & Automatic: The electric air pump with4 switchable pressure units (PSI, BAR, KPA, KG / CM2;), so you can set the tire pressure as desired. The compressor automatically shuts off when the set tire pressure is reached. The maximum pressure is about 150 PSI High Capacity Rechargeable Battery: With 2000mAh Certified Lithium-Ion Battery, this portable Compressor is ready to inflate bike, ball etc. The USB charging port supports fast charging. Use at night: 2 built-in LED lights that can turn on automatically and the back display make Mini Compressor easy to use even at night. Multifunctional: This air compressor is supplied with 3 nozzle adapters. It is possible to inflate beside tires, also ball, air mattresses, toys. Product main parameters: Charging time: 2 hours Battery type: lithium battery 12V 500x4 mA/H, Battery capacity: 2000mA Product color: black, silver Air pressure unit: PSI, KPA, BAR, KG/CM2 Multiple Use is designed for your life -For car/SUV/RV tires -For bike/motorcycle tires -For sports equipment -For inflatable toys NOTE: NOT for van, coaches, motor homes, trucks. Operation Steps 1.Connect the hose into the bottom tire valve core. 2.Press down the buckle on the air hose to prevent air leaking. 3.Press the button "Unit" to wake up the LCD screen. 4.Press the button "+" and "-" to preset tire pressure. 5.Press the power button to start inflating, it will stop automatically when the preset pressure is reached.