This is a specialized device for respiratory training, designed to prevent postoperative pulmonary complications and promote early recovery of respiratory function through sustained maximal inspiration. It is particularly useful for rehabilitation and health management. I purchased this for postoperative rehabilitation, but I hardly used it, so it's in clean condition. The hose and main body can be washed with water, so I have cleaned them. I will include only the unused spare mouthpiece. Purchase price: 4,180 yen