A left hand and right hand panel assembly, each consisting of an integral side panel plus top panel, are hinged to a mounting strip.? The mounting strip becomes attached to the outside of your laptop?s lid using factory-pre-positioned pressure-sensitive hook & loop strips. The assemblies overlap near the top center to form a 3-sided tunnel around the screen, approximately 9 inches deep. The resulting tunnel blocks most light infiltrating around? the top and sides of your screen. The panel assemblies can remain affixed to the outside of the laptop?s lid and swing nearly "flat" for storage.

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