This is a slide-lock type smartphone holder specifically designed for the 170 series Sienta. The sides lock due to the weight of the smartphone, allowing for easy one-handed attachment and detachment. Compatible smartphone size is 58mm to 88mm wide. It is widely compatible with both pre-facelift and post-facelift models, as well as gasoline and hybrid versions, but please check the shape of your dashboard before purchasing, as the dashboard shape may vary depending on the model and grade. This product is a set of a mounting attachment and a smartphone holder. The attachment part is made with a 3D printer. Please note that the quality may not be as high as that of a manufacturer-made product. The smartphone holder itself is a commercially available, manufacturer-made product. Due to packaging constraints, it will be sent disassembled, and the buyer will need to assemble it (just tighten one screw). When assembling, be careful not to overtighten the screw, as this may strip the threads. * The attachment part has layer lines from the 3D printing process. * If you want to secure it firmly, you can use the included double-sided tape. * The angle is fixed, so the installation position is limited to the position shown in the product photos.