[ICA-HM135] Why the ICA-HM135 display color in day time is become a little bit red?

ICA-HM135 is with IR feature, it has to work with IR pass lens. This kind of lens will allow the IR passed in night, but it will make the screen looks a little bit red, this is normal. Most of the IR camera will get this situation. You may select the White Balance option to fit the different light source. That will improve the display issue.