Increase Respiratory Strength: Inhale respiratory trainer breathing exercise device for lungs improves breathing quality and control performance. Training your anaerobic broadening and push your limits. Increase oxygen intake and maintain endurance.Improve Endurance: Using a breathing trainer can improve the strength and endurance of the respiratory muscles, fatigue of the respiratory muscles is a limiting factor in exercise, strengthening the respiratory muscles can improve the limits of exercise.Improve Lung Capacity : Breathing fitness exerciser device helps to expand and improve your lung capacity without the danger of doing a lot of cardio and burning calories.Usage Method: Inhale slowly and as deeply as possible through your mouth and hold your breath for a few seconds. Exhale slowly through your mouth until you are almost completely out of breath. Then repeat the above exercise 10 to 15 times to complete.Portable Device: The lung breathing trainer is very small and portable. With this device, you can perform your training routine wherever you are.Size: 5*10*3cmWeight: 40.7gQuantity: 1 pieceColour: black and white When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!