Feature 1Main Functions: It is used to improve the strength, endurance and shortness of breath of respiratory muscles, strengthen your respiratory muscles and make you breathe more smoothly. 2Indications: Lung exerciser expander device can relieve breathing, reduce dyspnea, improve sports performance, accelerate recovery and improve overall health and vitality. 3Easy To Use: It is light and easy to carry, and can be used for breathing training anytime and anywhere. Most people only need to use it once or twice a day for 1 to 5 minutes each time, which is suitable for all ages. 4With Gear Adjustment: You can adjust the resistance by breathing and inhaling, and you can adjust breathable tool according to your own situation. 5Suitable For Lung Diseases: It can effectively improve lung function and prevent respiratory diseases, and is suitable for the elderly, smokers and people suffering from respiratory diseases such as asthma. 6Yoga Assistance: Suitable for fitness people, sedentary people who lack exercise, exhale and asthma, people who suffer from brain hypoxia and dizziness, performing artists and singers who control breathing.Item Type: Lung Exerciser DeviceMaterial: Plastic, siliconeSize: Approx.5 x 3 x 8cm / 2 x 1.2 x 3.1in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xLung Exerciser Device1 x Bite Valve1 x Nose Clip1 x Storage Box