If a visitor came to your door while you were out would you have any way of knowing? Now you do. Simply install the digital door cam to any door for the ultimate in security and peace of mind. Before you know it you'll be capturing digital snap shots of every visitor- wanted and unwanted. Is that a pesky salesman at the door? Did an old friend stop by while you were away? Maybe it was a delivery man. Now you'll have a photographic record of every visitor. What if your home was robbed? Fingerprints can be useful if left behind but nothing beats a candid picture of an unwanted intruder. Because the lens looks like a simple peep-hole the guest will never know a picture was taken of them. Even has auto and manual mode. Kids can snap pictures of people at the door without having to answer. Even has preview mode allowing you to view the outside on the 1.8" LCD screen. When on auto mode picture will be taken when visitor has been present for at least 8 seconds. Time, day and date stamp capable. USB port lets you download images to your computer for storage. Stores 40 VGA resolution (350,000 pixels/640x480) 24bit color images. Advanced imaging system includes auto exposure, auto white balance, edge detection and enhancement back-light compensation for different lighting conditions. Installation is simple. Includes Ulead Photo Express software. 4 AA batteries not included.