The latest breathing trainer to "train" your breath. Lightweight and compact, it effectively strengthens lung capacity and respiratory muscles. Recommended for those aiming to improve sports performance, singing, diving, and endurance. 【Features】 ・Easy training, just breathe into the mouthpiece ・Designed to train both inhalation and exhalation ・5-level intensity adjustment, suitable for beginners to advanced users ・Lightweight and compact, convenient to carry ・Ideal for warm-ups before sports 【Recommended Uses】 ・Increase lung capacity with 5 minutes of breathing training per day ・Before endurance sports like marathons and swimming ・For vocalists and wind instrument players' breathing practice ・Also recommended for assisting rehabilitation in the elderly