A. Features: - Strength training of respiratory muscles may reduce shortness of breath and increase lung capacity. - It is small and compact, and can be carried around. - Most people can use it without side effects. - You can strengthen your respiratory muscles and abs with our breathing and lung exerciser device, which may ultimately enhance your overall performances. - The adjustable resistance can make tasks more challenging and allow for more intense exercise according to your needs. B. Specifications: - Material: Silicone - Color: Black, White - Size: Approximately 5cm/1.97' x 10cm/3.94' C. Note: - Please allow for about 1mm errors due to manual measurement. - Due to the difference between different monitors, the picture may not accurately reflect the actual color of the item. D. Package includes: - 1x Breathing Exerciser