Boost your stamina: Improve your breathing and upgrade your workout routine with our breathing oxygen trainer. Use our lung exerciser every day and watch your performance get better every day. Boost your lung capacity and tone your abs: With our abs booster, you can instantly increase your core muscles and oxygen intake as well as hold your breath. Forget about cardio to burn the calories you need. Enjoy Adjustable Resistance: Now you can adjust the pressure level of the Nemstar Deep Breathing Lung Exerciser. Find a resistance level that is right for your training and adjust accordingly. Improve your overall performance: Our breathing trainer can help improve your overall performance by strengthening your breathing muscles and abs. Increase your breathing stamina easily and quickly. Helps Improve Lung Capacity: Breathing exercises help improve lung capacity and help fight build-up that can be caused by toxins, tar, environmental pollutants, allergies, dust, and cigarette smoke. Packing List: 1*Nemstar Breathing Exercise Device "All our products go through strict quality inspection. If there is any quality problem or you are not satisfied with the product contact us. We will give you the best solution. "