Features:
Brand new and high quality
Soft silicone mouthpiece with grip texture, reduces airflow to the lungs, forcing you to take more focused and deeper breaths.
Resistance breathing training will cause and use oxygen more effectively, resulting in increased lung capacity.
The lung trainer regulates how much air you take in, trains your breathing muscles and increases your stamina in any sport or daily activity.
You can easily adjust the resistance of the valve to choose your desired level of breathing or resistance. Turn the valve to decrease and increase resistance.
Perfect for anyone with poor physical condition, smokers, athletes, singers, pilots who require professional training of the respiratory muscles.

Specifications:
Material: Silicone/ABS
Color: As the picture shown
Package Weight: approx.41g
Size: approx.10x5.5x3.5cm/3.9x2.17x1.38in

Note:
Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid.
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Package Includes:
1Pc x Lung Trainer