Breathing Fitness Device Expiratory Inspiratory Muscle Oxygen Trainer Increases Vital Capacity

High Efficiency - provides the widest range of inspiratory/expiratory resistance levels to meet anyone's needs. From the low resistance of respiratory rehabilitation patients gradually increased to the high resistance level of competitive athletes. Improves endurance, breath holding and shortness of breath. Easy to use - only one moving part. Turn the valve to the left to reduce air flow to create more resistance and turn it to the right to create less resistance. Very compact, only 4 inches high - you can take it anywhere and use it anywhere (pocket size). It's very comfortable. Flexible medical grade silicone mouth is very comfortable, providing an excellent fit and seal. Once it's in your mouth, you don't even have to hold it with your hands. Highly durable - heavy duty plastic construction and 100% rust resistance. Immediate benefits-it will open up airways into the lungs that have been partially blocked over the years due to natural aging, pollution, poor physical condition, and smoking (if available). Long-term BENEFITS - will target and develop respiratory muscles (diaphragm and intercostal muscles), helping you to take in more air/oxygen to your lungs and exhale more carbon dioxide. Size :10*5.5*3.5cm Color: as shown in the picture Quantity delivered :1