- Breathing trainer designed to strengthen respiratory muscles and improve physical endurance. - Equipped with a calibrated resistance spring adjustable in 11 levels to customize training. - Inspiratory muscle training that uses variable resistance to strengthen the diaphragm and ribs. - Ideal for active people and athletes who want to optimize their breathing during exercise or daily life. - Includes nose clip, storage bag, 4 cleaning tablets, and manual. - Helps reduce shortness of breath and improves general well-being after a few weeks of regular use.