ChoiceMMed MD8000B Respiratory Trainer, Lung Booster for strengthens respiratory muscles, Boost lungs capacity, breathe easier, feel better and improve athletic performance(White/Purple/Black) - Product Features
- the endurance effort level and strength effort level of breathing manoeuvres
- inhaling and exhaling
- difficulty levels to choose from (according to ones? ability)
- the breathing manoeuvres with rest periods
- the breathing manoeuvres in the internal memory
- breathing manoeuvres can be viewed on the digital display
- daily, weekly, monthly and overall averages