1. Insert the air needle of the air pump into the inflation valve on the inflation column, and the red pointer of the barometer points to 2-3 pressures.
2. Turn on the air pump switch and wait for 10- 15 seconds until the inflatable column is completely inflated and the barometer pointer points to the specified pressure, that is, 8- 10.
3. Repeat the above steps until the inflatable column reaches the required height and hardness.