First, unscrew the protective cap and adjust the inflation port to the inflation state.
Then, connect the inflation port of the pump to the bicycle tire port. Press the inflation port buckle, push the inflation microphone, and compress it up and down to inflate the bicycle. When you remove the pump from the valve, if you inflate the tire to high pressure, you will hear a loud air popping sound. Don’t worry, this is completely normal!
Finally, make sure to tighten the valve core nut to firmly fix it on the top of the valve to prevent the valve core from being twisted off.