Breathing Exercise Device Incentive Spirometer Coach 2 4000 Purchase Date: November 2025 Expiration Date: October 15, 2029 Manufacturer and Seller: Smith Medical Japan Purchased at a hospital for 4950 yen For those with a vital capacity up to 4000cc This device displays exhaled volume and is used to improve ventilation by stimulating the lungs through training to sustain deep breaths. It is effective in preventing atelectasis and complications before and after surgery. I purchased this new, but it ended up not being used and its purpose was fulfilled. It is unused and has been disinfected, but please refrain from purchasing if you are concerned. Size: 171 x 68 x 211mm Weight: Approximately 186g Graduation Range (mL): 250~4000 Coach 2 Please refrain from purchasing if you are sensitive to items stored at home.