Model Number:noxc7yz048-11 Package Dimensions:9 x 9 x 6 cm 1. Respiratory Muscle Training: Lung exerciser device works by creating resistance when you breathe, effectively improving your respiratory muscle. 2. Multifunction: Breathing lung exerciser can reduce breathing difficulties, improve exercise performance, speed recovery and improve overall health. 3. Increase Lung Capacity: Integrated breathing training device, which can effectively improve lung function and prevent respiratory diseases. 4. Portable: Respiratory muscle training device is suitable for people other than patients or professional athletes, which is small in size for easy to carry. 5. Acrylic Stainless Steel: Handheld breathing exerciser is made of acrylic and stainless steel, safe and sturdy, which allow you can use it at ease. Specification: Item Type: Breathing Exerciser Material: Acrylic, Stainless Steel Size: Approx. 7 x 4 x 8cm / 2.8 x 1.6 x 3.1in How to Use: Direct use Package List: 1 xBreathing Exerciser 1 x Manual Multifunction: Breathing lung exerciser can reduce breathing difficulties, improve exercise performance, speed recovery and improve overall health. Portable: Respiratory muscle training device is suitable for people other than patients or professional athletes, which is small in size for easy to carry. Increase Lung Capacity: Integrated breathing training device, which can effectively improve lung function and prevent respiratory diseases. Acrylic Stainless Steel: Handheld breathing exerciser is made of acrylic and stainless steel, safe and sturdy, which allow you can use it at ease. Respiratory Muscle Training: Lung exerciser device works by creating resistance when you breathe, effectively improving your respiratory muscle. See more product details Multifunction: Breathing lung exerciser can reduce breathing difficulties, improve exercise performance, speed recovery and improve overall health. Portable: Respiratory muscle training device is suitable for people other than patients or professional athletes, which is small in size for easy to carry. Increase Lung Capacity: Integrated breathing training device, which can effectively improve lung function and prevent respiratory diseases. Acrylic Stainless Steel: Handheld breathing exerciser is made of acrylic and stainless steel, safe and sturdy, which allow you can use it at ease. Respiratory Muscle Training: Lung exerciser device works by creating resistance when you breathe, effectively improving your respiratory muscle.