I didn't have the time to search too much, but I do know that this product was featured on a "Hometime" episode. As Jim-ATS stated, it is based on the same technology as LCD watches (etc.). I do know that if you search the Hometime site Dean and Robin you'll find the episode where they used the window. Take a HARD look around Hometime for "Privacy Window" and you should find it. Heck I think that I even posted there once as to who makes them.