Purchased new in 2020. I bought several units, so this item was never used and has been stored at home, which is why I am selling it. * Includes citric acid for electrode cleaning and the instruction manual. * Opened for photography. Due to long-term storage, the operation has been confirmed, and the main unit has been replaced with a new design cover, so this product has been maintained. I believe you can use it with confidence. Main unit: Width 185mm x Depth 185mm x Height 304mm Electrode part: 3m Power cord: 1.8m Weight: Main unit approx. 2.15kg, Electrode part approx. 315g Power supply: AC100～240V 50/60Hz Power consumption: 72W 【Request】 Please check the operation within 3 days of receiving the package. To prevent product substitution, we do not accept returns, refunds, or cancellations after purchase, except for defective products that do not operate. * If we do not receive any contact within 3 days of the package arrival date, we will assume that a good product has been delivered. Products purchased through Mercari, etc., are not accepted for repair by the manufacturer. Please note that we cannot provide support for repairs after use. Please purchase only if you understand the above. Thank you for reading to the end. Thank you for your consideration.