3.8 type [320 x 128 dots] TFT monochrome (white/black) LCD backlight 5 color LED (white/green/pink/orange/red) memory 3MB DC24V serial I/F RS-232 RS-422/485 high resolution TFT LCD, entry-color backlight (white/green/orange/pink/red) adopts high resolution TFT LCD (GT102020 ratio). 4x 320 x 128 dots and 32 black and white colors make it possible to display a beautiful display. RS-422/485, RS-232, USB devices standard When you connect an optional GT21-03SDCD SD memory card unit, you can install a SD memory card up to 32GB. Supports a wide variety of functions, such as logging, multi-channel, FA transparent, etc.