I purchased this for post-surgery rehabilitation, but I hardly used it, so it's in clean condition. I will include only a spare, unused mouthpiece. Purchase price: 4,180 yen It will be shipped without the box. 【Product Overview】 The Tri-Ball Z is a device specifically designed for respiratory training. It allows you to train to improve respiratory function, and is particularly useful for rehabilitation and health management. 【How to Use】 Attach the included mouthpiece to the main unit and breathe through the tube. The three balls visually indicate the strength of your breathing, supporting effective training. 【Features】 Compact design for easy portability. You can easily train at home or on the go. Thank you for looking.