Breathing Exercise Device for Lungs, Breathing Exerciser Trainer, Deep Breathing Lung Exerciser Device, Adjust Resistance Improve Lung Capacity Handheld Lung Expansion Training Tool 1.【Strengthen Your Endurance】: Helpful to improve your breath, Breathing Exercise for Lungs allows you to get better endurance and makes you feel better day by day. 2.【Helpful and Effective】: Makes it possible for you to exercise core muscles, Lung Exerciser Device will strengthen your lung capacity and help you adjust the abdominal muscles. 3.【Modifiable Resis-tances】: Provides you with different resis-tances levels, Deep Breathing Lung Exerciser features adjustable resis-tances for you to easily change accordingly. 4.【Increase Body Performance】: Breathing Trainer for Lungs makes an excellent exercise tool to build up your breathing and abdominal muscles, so you can strengthen overall performance. 5.【Lung Capacity Enrichment】: Lung Endurance Trainer can help you significantly boost your lung capacity by reducing the buildup brought on by bodily waste. 6.Size: about 5*10cm/1.97*3.94inch Material: Silicone, ABS Weight: about 68g