Description Reminder: Please read the instructions carefully before use The electric portable air pump was succefully developed! Please read this manual carefully when using this air pump for the first time. This product was developed for emergency pumping of bicycle high preure tires used in international competitions. It is also suitable for the inflation of ordinary bicycles, automobiles, motorcycle tires, balls, inflatable toys and other entertainment tourism products. Instructions for use 1. The first normal charging time is 4 hours after charging, until it is fully charged each time. 2. Turn on the power button, the LCD screen starts to display, pre the switch button to switch the four air preure units PSI, BAR, KAP, KG/CM2, select the unit you need, pre the plus and minus keys to set the air preure value you need, after the flashing stops, Pre the power button to start inflation. 3. Short pre the light button to switch between motorcycles, bicycles, cars, and balls. Display motorcycle mode default 28PSI Display bike mode default 120PSI Display car mode default 36PSI Display ball mode default 8 PSI 4. Define and set the air preure value by yourself. Short pre "-" or "+" to adjust the preset preure value, long pre "-" or "+" to quickly adjust the preset preure value. 5. Pre the power button to start inflation. When the inflation preure reaches the preure value you set, the smart inflator will automatically stop the inflation work immediately. 6. When the air pump starts and detects that there is no air preure, it will automatically stop working for about 40 to 50 seconds. 7. After the inflation is completed, unscrew the trachea to complete the inflation, and pay attention to connecting the tire inflation connector to see if it is hot; there will be a small amount of air leakage when the connector is unscrewed, which is a normal phenomenon. 8. If it is judged that the tire preure is too high, you can use the tire inflation connector to screw the corresponding position on the valve core to deflate and decompre. 9. Unscrew the tire inflation joint from the main unit, put the cylinder away, and put it in a dry, ventilated and safe place. Technical parameters 1. Measuring range: 3~150PSI 2. Measurement accuracy: 1.5PSI 3. Resolution: 0.5PSI 4. Temperature range: -10 to 80 degrees Celsius 5. Working voltage: 7.4V 6. Input voltage: 5V/1~2A 7. Working current: 1-5A 8. Maximum current: 5A 9. No-load current: 2A 10. Charging Type-c, charging time ~4 hours 11. Unit selection: pre to switch the unit, PSI, BAR, KPA, Kg/cm2 12. Preset three sets of air preure modes: 8PSI for basketball, 28PSI for motorcycles, and 35PSI for cars 13. Control accuracy: 1.5PSI 14. Luminous work light + warning light SOS 15. Automatic shutdown when the preset air preure is full 16. Has the current working temperature display value Acceories description 1. H8 air pump host 2. Inflatable tube 3. Inflatable acceories connector 4. USB charging cable Fourth, matters needing attention Children are prohibited from using the inflator! Please keep it out of the reach of children! Do not insert the trachea into the mouth, ears and eyes of live animals, and do not use the inflator as a toy! It is forbidden to use this gas cylinder near flammable and explosive liquids and gases (such as gas stations)! Do not walk away during the inflation proce. After 10 minutes of continuous use, the machine must be shut down for 10 minutes. When there is abnormal noise during inflation or the temperature is too high, please turn off the machine immediately and let the machine cool down for at least 15 minutes. Be careful with hot hands when removing the trachea. The product is resistant to rain, water and impact. If the gas cylinder is not used for a long time, it must be stored in a dry and airtight place. If stored for a long time, it is recommended to charge it every three months. Before using the charging pump, please check whether the charging is sufficient. The first charge is 4 hours and each subsequent charge will last until fully charged. For your safety and the safety of others, use the pump and its acceories in accordance with the manufacturer's instructions. Use not mentioned in the manual may be dangerous.