Thank you for viewing. This is a waterproof smartphone case from MUJI. From the following website: This smartphone case has excellent waterproof performance (IPX7 equivalent) and can be used in places where it is likely to get wet, such as the bathroom or kitchen. You can operate touch panel smartphones even with wet hands, allowing you to check emails and browse the internet. The bottom case is transparent, so you can also take photos with your smartphone's camera. It is sized to accommodate the increasingly large displays. ○ Specifications Usable portable device size: Width 171 x Height 92 x Depth 6.8-12.5mm * Not compatible with pressure-sensitive buttons or Face ID. Waterproof performance: IPX7 (waterproof protection level 7) equivalent. With strap hole.