Features & Benefits
- Adjustable resistance with three steel balls for personalized lung training.
- Portable and lightweight for easy use at home, work, or on-the-go.
- No batteries required - perfect for maintaining your lung training routine anywhere.
- Made from durable, medical-grade PC material for long-lasting use.
- Transparent design for easy tracking of lung exercise progress.
- Simple to use, suitable for everyone, targets exhalation muscles.