Trust Kensington, the choice of it professionals, to help protect the sensitive information on your MacBook Pro to reduce the chances of wandering eyes viewing confidential data on your screen. Mp Series laptop privacy screens limit the field of vision to +/- 30 degrees so a person off to the side only sees a dark screen. They are easy to accessorize this to your MacBook with the innovative magnetic strip. The reversible privacy screens also use low reflective Coating to reduce glare, and they filter out harmful Blue light by up to 22 percent.Q: Will My MacBook Pro be able to completely close with the privacy screen attached, just like it does without a privacy screen? A: because our MP13 and MP15 are .87mm thick, a MacBook Pro will have a slight gap when closed. All magnetic privacy screens attach to the frame and not to the screen, which is why the MacBook won't completely close when using any magnetic privacy Screen.Q: What are the advantages of a magnetic privacy Screen? A: a magnetic privacy Screen can be taken on and off a laptop easily and quickly. Our MP13 and MP15 privacy screens come with a storage sleeve for the screen when not in use.Q: Will My MacBook still "sleep" When closed with the privacy screen attached? A: Yes, as long as you have that functionality enabled.Limits viewing angle to +/- 30°