Nokia Lumia 830 Screen Protector Cover, MPERO Collection 5-Pack of Mirror Screen Protectors for Nokia Lumia 830 Specially designed front screen protector for Nokia Lumia 830. Shiny finish allows phone to act as a mirror. Non-adhesive backing will not leave sticky residue behind if you decide to remove screen protector. Includes cloth, detailed instructions, and screen protector. MPERO is a protected trademark.