Breathing Exercise Device Incentive Spirometer Coach 2 2500 Purchase Date: December 2023 Manufacturer: Smith Medical Japan Purchased at a hospital for 3560 yen For those with a vital capacity up to 2500cc This device displays exhaled volume and is used to improve ventilation by stimulating the lungs through training to sustain deep breaths. Effective for preventing atelectasis and complications before and after surgery. I bought this new, but it ended up not being used and its purpose was fulfilled. Size: 171 x 68 x 211mm Weight: Approximately 186g Scale Range (mL): 250~2500 Coach 2 Please refrain from purchasing if you are sensitive to items stored at home. *Please refrain from price negotiations.