Thank you for viewing. Oral Immune Training Device: Littre Meter I purchased this at a dental clinic and opened the box, but I never used it and have kept it in storage. I would be happy to pass it on to someone who needs it (*^^*) Also, [Only the small mouthpiece is included‼️]. The instruction manual is also included. ✴︎I am also selling this on other platforms, so I will prioritize the first person to purchase. This device is used to train the muscles around the mouth and display the results numerically. It's for children undergoing orthodontic treatment or for those who are concerned about the weakening of the muscles around their mouth. There is also an instruction manual with usage instructions.