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