Operator interface touchscreens have the same color conversion technology as LCD TVs with LED backlight intensity to 800 cd/m2, and include a 400 MHz RISC processor, and built-in video in and audio in/out interfaces. Up to four MicroSmart expansion I/O modules snap onto the back of the panel for simple I/O control. It includes 12 MB of user memory, and an SD card and USB flash drive can be used for extra storage.