When night vision is switched on, the image is in black and white.
The night vision functions by sending infra-red light from the monitor to the environment. The monitor then converts this invisible infra-red light to visible black-and-white image.
The monitor is equipped with an AUTO option for night vision. When the environment is dark, the night vision would be switched on automatically. When the environment is bright enough again, the night vsion would be off automatically.
If the image is continuously black and white no matter the brightness level of the room, it is probably because the night vision is switched to ON (instead of “AUTO”).
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