I said “another” means we have covered other similar digital door viewer in the past. Yes, we have, and it seems the first one is better than this latest one – in term of features and functionality. The first digital door viewer have a motion sensor to detect movement around your door and will record them into a 4gigs SD card (available at Thinkgeek for $200).
While this second digital door viewer that I found is pretty lack of feature. The only plus point is the slightly larger viewing area and the clear digital image.
This Digital Door viewer will eat up to 8 pieces of AA size batteries to power it up. But thanks to them, there is no cable hassle for you in this device to connect the peephole video camera with the LCD that placed inside of your door.
The estimation of the battery lifespan is 1,000 of 5-second viewing cycles. Should be enough for two months or so (if you have around 10 visitors a day).
This Digital Door Viewer is available at Frontgate, with a higher price mark of $399 (compared to the first one).