... . Multi-language, Firefox, Safari, Google browser8. Built-in IR Cut,No Color Cast. 9. 3xOptical Zoom, Lens:4- ... Centre SoftwareSupport 1,4,9,16,25,36 channel monitoring in one screen, no channel limited ,Support centralized ... HorizontalLight Frequency50Hz, 60Hz or OutdoorVideo ParametersBrightness, ContrastNight Visibility10 Φ5 IR LEDs, Night visibility up to 10 metersAudioInput / OutputBuilt-in ...