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Core Features How It Works Positive Expiratory Pressure (PEP) Therapy When you exhale through Kan‑Breathe, a light back‑pressure vibrates over the airways. This loosens mucus, making it easier to cough up and clear. Adjustable Resistance with Steel Balls Equipped with two stainless‑steel ball bearings, the unit offers both minimal and maximum resistance settings. This feature allows customization to match lung capacity, age, or condition — accommodating users from children