Thank you for viewing. I purchased this as instructed by my doctor before surgery. I used it a few times, but no longer need it after being discharged from the hospital, so I am offering it for sale. * There were two mouthpieces included, but I only used one. I will include the unused mouthpiece. * The instruction manual and other accessories are all included. * It is in good condition, but it has been used. Please refrain from purchasing if you are overly concerned about this. * Retail price: 4,200 yen * Manufacturing date and expiration date: Manufacturing date: 2023.06.26 Expiration date: 2026.06.26