The Eizo CX240-BK 24" ColorEdge LED monitor with EX Sensor features a third-party sensor is required for calibrating the monitor, but the monitor's built-in SelfCorrection sensor maintains the calibration settings when used with the ColorNavigator software. The SelfCorrection sensor is housed within the monitor's upper bezel and appears only after a specific amount of time determined by the user has elapsed. Even if the monitor is switched off or not connected to a computer, it will stick to its preset schedule and self correct. It comes with an ASIC (application specific integrated circuit) developed to meet the needs of the graphics market. The ASIC has its own algorithms used in high-precision color processing to produce smooth color tones.