A pressure controller that relieves ear discomfort during takeoff and landing.Because the pressure on the take-off and landing changes instantaneously.too fast, which can cause the ear to strain, and then cause the stress to be inconsistent with the outside world, which can cause discomfort in the ear. The device allows the oropharyngeal tube to be opened smoothly, in the right direction. It also relieves ear discomfort and takes off and descends. The opposite way to balance the pressure at the other way around. The use of no electricity, can be used many times, just change the front earplugs.
