Used only twice. Stored at home for two months. Since I have no use for the coin battery, I will ship it with the battery inserted. The battery has hardly been used, so I think it still has plenty of life left. It's not new, but it's almost unused, so the condition is good. There are some minor scratches on the measuring area (image 8), which were there originally. I don't think it's particularly noticeable, but it depends on the person, so please refrain from purchasing if you are looking for a perfect product. Would anyone like to try it? Retail price: 2860 yen Salt concentration meter