The Ultra Vision door viewer is one of the most advanced door viewers on the market. This door viewer has a technologically advanced lens that provides a panoramic view. The viewer has a 2 ¼” screen that you can see outside for more than seven feet away. This particular door viewer is made of high quality ABS plastic resin that is fire resistant. Because of the high resolution lens the door viewer is perfect for elderly and handicapped people, children and small adults.