... infrared light automatically by the movement of zoom switch, the actual effective night vision ... lines, two pattern scan head orientation, multiples camera display, temperature display, the guard bits, power ... PAL/NTSCHorizontal resolution:540TV linesBuilt-in Lens:30X, 3.3-99mmMinimum Illumination:0.01LuxSync ... Chinese and English OSD menuColor to black: Color to black, IR-CUT filterswitchFocus System:: ...