1、Main 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. 2、Indications: Lung exerciser expander device can relieve breathing, reduce dyspnea, improve sports performance, accelerate recovery and improve overall health and vitality. 3、Easy 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. 4、With Gear Adjustment: You can adjust the resistance by breathing and inhaling, and you can adjust breathable tool according to your own situation. 5、Suitable 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. 6、Yoga 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 Device Material: Plastic, silicone Size: Approx.5 x 3 x 8cm / 2 x 1.2 x 3.1in 1 x Lung Exerciser Device 1 x Bite Valve 1 x Nose Clip 1 x Storage Box