Trideer Extra Thick 33/34cm Balance Cushion Air Stability Wobble Board Rehab Cushion for ADHD Fitness Exercise Workout Posture Trainer with Free Pump to Adults or Children

How to inflate the balance board ?
1) Find the hole on the 4th outer ring.
2) Insert the needle of the pump into the tiny hole for inflation; Carefully insert the needle at a slight angle 10-70° into the valve.
3) Be sure the needle is fully inserted to the hole, otherwise, it might be very difficult to inflate the balance board.
4) Stop inflating when the cushion's height ...