MT8121XE3 12.1 12.1" 1024 x 768 IPS LCD, LED Backlight, Plastic enclosure, Fan-less, 256 MB Flash Memory, SD Card Slot, One USB Host Port and one USB Client Port, COM1 and COM3 RS-485 Built-in Isolation, COM1 and COM3 RS-485 2W support MPI 187.5K, please use one at a time & Dual Isolation