Only the user can see on-screen documents. From the side, others see a dark, blank screen. Filter can remain in place even when computer is closed. Sold by each.
    
  
  Only the user can see on-screen documents. From the side, others see a dark, blank screen. Filter can remain in place even when computer is closed. Sold by each.
    
  
  Only the user can see on-screen documents. From the side, others see a dark, blank screen. Filter can remain in place even when computer is closed. Sold by each.
    
  
  Only the user can see on-screen documents. From the side, others see a dark, blank screen. Filter can remain in place even when computer is closed. Sold by each.
    
  
  Only the user can see on-screen documents. From the side, others see a dark, blank screen. Filter can remain in place even when computer is closed. Sold by each.
    
  
  Only the user can see on-screen documents. From the side, others see a dark, blank screen. Filter can remain in place even when computer is closed. Sold by each.
    
  
  Only the user can see on-screen documents. From the side, others see a dark, blank screen. Filter can remain in place even when computer is closed. Sold by each.