Lenovo 4XJ0L59645 Privacy Filter for X1 Tablet from 3M CONDITION:New The Retro Platinum Frigidaire 4 VIP661858002563MN The Retro Platinum Frigidaire 4 Press and hold the force sensor on the stem to switch between Active Noise Cancellation and Transparency Mode General InformationLenovo Privacy Filters for the X1 Tablet utilizes the patented 3M microlouver privacy technology to darken the screen at specific angles so as to block the vision of wandering eyes from viewing your screen while you work This is a key benefit to companies as it provides the first line of defense against visual hacking protecting private information from being hacked by on lookers