Construction: The body is primarily made of durable metal, such as brass or zinc alloy, which is then plated with a black and gold finish. The lenses are typically made of high-quality optical glass for clarity.
Wide Viewing Angle: These types of door viewers often feature a wide-angle lens, commonly offering a 180 to 220-degree field of vision, which helps eliminate blind spots and provides a comprehensive view of the area outside your door.
Privacy Cover: A notable feature is the heavy-duty rotating or swivel cover on the interior side (visible on the viewer on the right in your image). This cover can be closed to prevent anyone from the outside from seeing into your home, ensuring your privacy.