I purchased this at the hospital, but I only opened it once to listen to the pre-hospitalization explanation and then stored it away. Therefore, the top of the instruction manual is slightly creased, so please purchase only if you can accept that. I think it was less than 4,000 yen. I kept it at home without using it after being discharged from the hospital. During hospitalization, this device is used to train the respiratory organs to function smoothly as they weaken. The surgery was successful, and the prognosis was good, with remission expected to lead to complete recovery, but this time I received an official diagnosis of complete recovery! I think it's also auspicious. I will ship it with the sincere hope that you will recover successfully.