Thank you for viewing. I am selling this item, which was purchased from a 20-something non-smoker who used it for approximately 5 months for Invisalign orthodontic treatment, starting in February 2025, and is now selling it as their orthodontic treatment finished in September. ◆ My Usage: - 29 years old, female - Usage period: February 2025 - September 2025 - Non-smoker - No oral problems such as cavities or periodontal disease - Used for Invisalign orthodontic treatment - I cleaned it daily, but it is a used item, so there may be a feeling of use. - The power can be fully charged, and with 4 minutes of use per day (upper and lower teeth), it would last for more than a week on a single charge. ◆ Product Introduction - Brand: PBM HEALING - Model: Ortho - Retail Price: ¥110,000 - Product Number: OE-01 - Color: Transparent/Pink - Accessories: Main unit, charging cable, instruction manual - Purpose: Oral care #PBMOrtho #LightAccelerationOrthodonticDevice #Invisalign