1.Connect the power pack with the main unit (if it is vehicle-mounted connection box, insert the connector into the cigarette lighter), short press the power button to air pressure units (PSI,BAR,KPA). 

2.Press "+" or "-" to adjust the required air pressure value.

3.Connect the air pressure tube with the item you want to inflate and press the trigger on the handle to start pumping. It will shut off automatically when the air pressure reaches the set value.

4.After using, long press the power button (more than 3 seconds) to turn off, and remove the battery pack or the vehicle- mounted connection box. If it is vehicle-mounted connection box, unplug the connector from the cigarette lighter.

Charging instructions:

1. Remove the battery from the main unit by pressing locking tabs in and pulling out.

2. Plug the charger into the power socket (100-240Vac, 50 / 60Hz).