Insert one end of the charger into the car USB in advance, and insert the other end of the USB plug into the USB socket on the top of the gas cylinder to charge the gas cylinder. The normal charging time is 4 hours after the first charge until it is fully charged. Connect one end of the tire inflation connector to the air cylinder, and press the other end into the tire valve core, and then press the reverse button down. Please note that the order of connection is important; at the same time, note that there are two types of pipe fittings: American and French. The joint of the trachea itself is American, and the independent French joint should be screwed to the American joint. Press the power button, the LCD screen starts to display, press it again to start the conversion between the four units of PSI, BAR, KAP, KG/CM, select the unit you want, set the key to set the air pressure value you need, and finally press the power The switch starts to inflate, and when inflated, the LED at the bottom of the gas cylinder lights up. The setting button is the pressure value setting button, click for slow adjustment, long press for fast adjustment, and adjust to the appropriate pressure value of the inflated object; the pressure value flashes for 4 seconds, and it is automatically set, or can be set by pressing the switch. Press the power switch, when the inflation pressure reaches the pressure value you set, the smart gas 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. After the inflation is completed, quickly unscrew the tire inflation joint from the valve core or the same counterclockwise. Before unscrewing, be careful to check whether the tire inflation joint is hot; there will be a small amount of air leakage when the joint is unscrewed, which is normal. If it is judged that the tire pressure is too high, you can use the tire inflation connector to screw the valve core at a suitable position to deflate it. Unscrew the tire inflation connector from the main unit, insert it into the storage slot at the bottom of the air cylinder, close the air cylinder, and place it in a dry and ventilated safe place.