This is a pocket for hanging your smartphone in various places inside your car ^^ You attach the belt with double-sided tape. It seems like it can be attached to fabric, leather, etc. ^^ You can operate the screen even with your phone stored inside. I am also selling an unopened, unused one (with a box). If you want a set with that, it's an additional 300 yen, so please comment if you'd like a set m(_ _)m