Mademoiselle Ai 444Hz Tuner: A set including one "The Health" tuner and one dedicated hammer. 444Hz Tuner: Regular price: 15,000 yen Dedicated Hammer: Regular price: 1,200 yen I purchased this and used it a few times, but I stopped using it and have been storing it at home. Due to the material of the product, there are no noticeable scratches, but please understand that there may be some initial lines or minor scratches from use. *Please check the photos for the condition of the product. The following is a quote from the manufacturer's description: [Important] Notes on using the tuner ◆ The effects of the tuner are not medically or scientifically recognized. ◆ The sensation of use varies from person to person. ◆ You may feel sleepy when using the tuner. Please refrain from using it immediately before or during driving. ◆ For use on infants, children, or people with illnesses, please consult a doctor. ◆ Do not ring the tuner at a high volume near the ears or press it strongly against the skin. <Regarding the markings on the U-shaped part of the MI tuner> The final check of the tuner during manufacturing (final frequency check) is performed by skilled craftsmen who finely shave the U-shaped part of the tuner. (There are only two people in Japan who can do this.) Therefore, almost all MI tuners have marks on the U-shaped part. Other manufacturers use products that are pressed as they are, but all MI tuners have marks because the final frequency adjustment check is done by skilled workers who shave the product. The marks on the U-shaped part are also a characteristic of the MI tuner. We hope you understand this beforehand and enjoy using your tuner, considering the marks as a unique feature.