Product: salua USB Rechargeable Hot Eye Mask Includes charging cord - Cordless design for relaxation without unnecessary stress. - Easily adjust the temperature with a single power button on the main unit. - The eye mask surface is made of high-quality 100% silk material that is breathable and gentle on the skin. - Removable cover is washable. *Functionality confirmed. Purchased for around 4000 yen, but never used. Please understand that this item has been stored at home for a long time without the original box before purchasing.