With everything going digital, why not the peep hole? The digital PeepHole Viewer attaches easily to any door and uses two AA batteries to give homeowners a panoramic view of the outside. It has a 2.5-inch LCD screen that prevents reverse peep hole viewing, a “zoom” mode, and a sleep function for battery conservation. Cost: $129. Brinno. 772-924-0034. www.brinno.com.