Measurements based on Digital Image Correlation (DIC) require accurate and synchronized data and image acquisition. The Device Control Unit (DCU) X is the central controller for every StrainMaster system from LaVision. It is responsible for the camera synchronization and takes over the communication with the other peripherals. For this purpose, it is equipped with all the connections necessary for the operation of a 2D or stereo camera system, including three channels for the acquisition of analog data from a connected test device and the voltage supply for two StrainMaster LED line lights. Thanks to its compact design, the DCU X can be attached directly to the tripod of a StrainMaster Portable system, which makes mobile use possible. Alternatively, the DCU X can be used as a desktop device. The DCU X has a built-in Windows 10-compatible PC with StrainMaster DIC 1.1 or DaVis 10 installed (option).