1Effective Ear Pressure Equalization: By performing a series of actions such as pinching the nose, closing the glottis, and controlling tongue position, this ear pressure balance diving tool creates a sealed chamber filled with air in the oral cavity. By exerting pressure on the air inside the mouth, it helps balance pressure by lifting the Eustachian tubes and allowing air to enter the middle ear via the pharyngeal cavity. 2Aluminum Alloy Material: Made from premium aluminum alloy, this diving ear pressure balance equipment is lightweight yet sturdy, providing exceptional durability. Its surface is treated with anodization, offering erosion resistance and rust prevention, ensuring long lasting performance. 3Stable Grip: The specially designed groove in the middle of this ear equalization training tool enhances your grip, enabling a more stable and secure hold during underwater training. Experience enhanced control and confidence while practicing diving skills. 4Comfort and Hygiene: With smooth airflow and a snug fit, this ear equalization training tool ensures comfortable usage. Its intake port features a dual water flushing system, ensuring thorough cleaning of the airway. Maintain a clean and hygienic breathing passage, enhancing safety and comfort during extended dive sessions. 5With 3 Balloons: This ear equalization training tool comes with three secure and stylishly colored balloons that can be easily stored in a storage box. It adds a touch of elegance and functionality, providing convenience for quick and easy access. Item Type: Ear Equalization Training Tool Material: Aluminum Alloy Weight: Approx. 72g/2.5oz 1 xEar Equalization Training Tool 3 x Balloons 1 x Storage Box