Feature:1. Balance Middle Ear Pressure: Helps to balance pressure in the middle ear and can be effective in relieving discomfort that may occur while travelling or during the busy cold and allergy season. Aids in regulating pressure differentials for greater user comfort and relaxation.2. Relieves Nasal Congestion: Our earplug device pushes a steady airstream into the nasal passages, quickly opening the eustachian tubes and allowing fluids to drain more easily, while balancing barometric pressure and relieving congestion and bloating due to changes in altitude, nasal congestion, and earplugs.3. Easy to Use: Instead of relying on messy ear drops or irritating earplugs, using the device allows the user to alleviate discomfort inside the ear with a simple use. Provides users with an easy and effective way to manage ear pressure issues.4. Portable: With its lightweight and compact design, you can easily tuck this ear pressure relief device into your pocket or slip it into your purse, handbag, tote or backpack. Whether you are travelling, out of the office or doing outdoor activities, you can always carry this device with you.5. Multifunctional: Not only does it help to balance the pressure in your ears when taking off and landing in an aeroplane, driving in the mountains and when you have a cold, but it can also be equally effective in a variety of other situations, such as scuba diving, travelling to the highlands and so on.Specification:Item Type: Ear Pressure Relief DeviceMaterial: ABS Built in Battery: Lithium ion battery 900mAH(built in)Application: Suitable for diving, high altitude and other ear negative pressure is large situation.Package List:1 x Ear Pressure Relief Device1 x USB Cable1 x User Manual