I purchased this on Mercari, but the other product (rollermouse) suits me better, so I'm selling it. The seller only used it while teleworking, so they didn't use it very often. I've only used it for about a week. This is a rare item that is rarely put up for sale. Due to the weak yen, the price is also quite high, so I think this is a good deal. ◇Product Information https://www.ergonomics.co.jp/smartphone/detail.html?id=000000000065