This is a 2x teleconverter for Fujifilm X-mount. Please check the official website for details such as specifications. https://www.fujifilm-x.com/ja-jp/products/lenses/xf2x-tc-wr/ Purchased in September 2016, it has only been used twice and has been stored in a dry cabinet since then. The box and accessories are all included. There are no noticeable scratches or stains on the exterior, and the optics are clean with no dust, mold, or fogging. However, there is a scratch on the cap as shown in the fourth photo. *Please also check the notes in the profile.