Additional product info: Attach it to the back of your smartphone to support holding or change the angle of the ring to use it as a stand. This product does not completely prevent the attached smartphone from falling. It cannot be used on glass surfaces, or smartphones and smartphone cases treated with anti-fouling and anti-fingerprint processes. Please check the compatibility chart of the manufacturer before purchasing. If the part where it is attached serves as a cover for battery or memory card replacement, the cover may come off during use. Please clean the area where you will attach this product before use. If used with dirt or oil remaining, adhesion may decrease. Depending on your smartphone, it may not be possible to use as a stand. Smartphones are not included.