Are supplied 4 sets (1 each front and back sheet with 1 cleaning cloth) - well, I find that the slide sets are packaged individually in addition. So they are protected when stored in the desk from contamination.
The manufacturer must provide with a step by step guide, and you can watch a video tutorial on Youtube. However, the film is characterized and is not required necessarily the manual.
Application
- I have my smartphone cleaned with a lens cleaning cloth
- Additionally uses the supplied cloth (dry)
- Step 1 - marked film was removed and glued (you can even pull off again and place it back, if the film is not optimal sitting)
- Step 2 - Slide away
- Small bubbles with the cloth pressed out - finished
Now, the film remains to be seen how long it provides a clear view. So far I am thrilled and did not feel that the film decreases the color brightness of the display.