Video door phone/entry/bell
system,access control,door station/unit/
camera,indoor phone/monitor,security product,video intercom.
CCTV Camera Features:
1/4 ... auto switch and available to change the color into B&W under a low illumination.Image component: 1/4-inch Sony ... : 510 x 492 pixelsPAL:500 x 582 pixels
Synchronization
system: inner Horizontal resolution: 420TVLFocus: 3.9 to 85.8mm Minimum ...