NEC HC3915 is a high-quality monitor with auto-tracking and digital control. It supports a wide range of video signals: RGB separate (8 colors and 16 colors pastel/saturation), RGB R'G'B” TTL separate (64 colors), RGB analog signals, and TTL text mode. The monitor automatically adjusts to the size and position of the picture to operate the IBM system (VGA). It also offers manual adjustment for other computers using the buttons on the right side panel of the unit. Users can also connect multiple monitors in a loop-through-string configuration to display the same image on multiple screens.