Compatible with both the S3-4K and E2 Event Master processors, the EC-200 is a stand-alone controller featuring a Linux-based operating system and a built-in Central Processing Unit (CPU). It brings the ability to have source, preset, layer, and destination selection at your fingertips, along with a trackball, dedicated programming section and two touchscreen displays. The EC-200 also provides instant access to switch sources live on program, and enables you to select large groups of resources at the same time, and manipulate layers like never before.