Developed electric portable pump! Please read this instruction manual carefully before using the pump for the first time. This product is developed for the emergency pumping of high-pressure tires for bicycle international racing vehicles. It us also suitable for the inflation of ordinary bicycles, cars, motorcycle tires and balls, inflatable toys and other entertainment travel articles. 1. Insert the pin on one end of the charger into the car USB beforehand, and plug the other end into the USB socket on the top of the air pump to charge the air pump. The normal charging time is the first time after charging for 4 hours. 2. Connect one end of the tire inflation joint to the air cylinder, and the other end to the tire valve core, then press the reverse button down. Please note that the order of the connections is important; at the same time, note that there are two types of pipe joints, American and French. The joint of the trachea itself is American, and the independent French joint is screwed to the American joint. 3. Power on button, the LCD screen starts to display, press again to start conversion between PSI, BAR, KAP, KG/CM four units, select the unit you want, set the button to set the pressure value you need, and finally press The lower power switch starts to inflate, and when inflated, the bottom LED of the air cylinder is bright. 4. Set button to pressure value setting button, press for slow adjustment, long press for quick adjustment, adjust to the appropriate pressing value of the inflation object; pressure value flashes for 4 seconds, automatically set, or press the switch to set . 5. Press the power switch. When the inflation pressure reaches the pressure value you set, the smart air cylinder will automatically stop the inflation work immediately, but the LED light is still on, and then press the power switch to turn off the light. 6. When the inflation is over, quickly rotate the tire inflation joint from the valve core or the counterclockwise. Before