This is a camera lens set for smartphones. Multi-function lens set: wide-angle, macro, fisheye lens, etc. Installation method: Clip-on type, easily attachable by simply clipping it onto your smartphone. The instruction manual is in English and Chinese, so I have included an image translated by Google Translate. Please use it as a reference. I only used one once and then stored it. I'm not sure if everything is included or not, but the items shown in the image are what will be given to you.