● Introduction: breathing trainer is is a new kind of physiontherapy aid to restore normal breathing,which can effectively help patients with respiratory impairment after chest and abdomen operation.The product is portable,simple and easy to use. It is an inspiratory muscle training device for improving the strength and stamina of the muscles used to breathe in. It can help patients to recover normal breathing after a chest or abdominal surgery, It is also a common recommendation to COPD patients. ●Application： It is Applicable to the recovery of pulmonary respiratory funtion in patients with decreased pulmonary fucaiton caused by thoracic and pulmonary diseases,surgery,anesthesia and mechanical ventilation.Reduce and prevent postoperative pulmonary complications.It use for postsurgical patients, COPD patients, regular smokers, healthy people or athlete. ● Features: 1 Small and Light Design for Easy Handling and Cleaning 2 Soft and Skin-friendly Medical Grade Silicone Mouthpiece 4 0 Leaning Cost ONLY 5 Minutes to Learn and Master 5 Strongly Improve Dyspnea and Quality of Life After 4 weeks training 6 Drug-free Method No Side Effects or Drug Interactions ●Performance: Spring Resistance The device uses a variable load calibrated spring, calibrated to your chosen resistance. It can be adjusted from the lowest load setting when you begin training and increased as your breathing muscles adapt and become stronger.The standard unit used to measure breathing resistance is cmH20, which is short for “Centimeters of water”.