External color calibration sensor specifically designed for the ColorEdge CS series; compatible with ColorNavigator 7. To ensure that a graphic monitor consistently displays images accurately, regular hardware calibration is recommended. For the ColorEdge CS series monitors that do not have a built-in sensor, an external color calibration sensor like the EX4 is required. The EX4 color calibration sensor works in conjunction with the ColorNavigator 7 software to measure the color representation of the ColorEdge monitors. The EX4 color calibration sensor is also compatible with the ColorEdge CG series monitors. With a ColorEdge CS monitor and the EX4 calibration sensor, you can create your own photo bundle.