https: www.ebay.co.uk/itm/127002887767?itmmeta=01JXQ24SZYTZJ8YTR6TMJFFPVX&hash=

This device is designed to help clear mucus from the lungs and improve breathing. It uses positive expiratory pressure (PEP) therapy to strengthen lung function and promote airway clearance, especially beneficial for individuals with respiratory conditions such as asthma, COPD, or bronchitis.

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