Applies to: DH81NK/DH41NK/DM21O/DM31O/DN81NB/DM41G/DN41CJ/DN81BJ/DN61EC/DG81W/DG61X/DG41T/DT81DQ/DT41DC/DT61ER/DG41BE/DG81BE
If you find all the cameras are black and white even in the day time, here is a solution.
If your DVR doesn‘t have TVI&AHD option, please tell us your DVR and camera‘s model number.
DVR‘s model can be found at the bottom label and camera‘s can be found on its label.
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