The CORSAIR iCUE COMMANDER CORE XT is a digital fan speed and RGB lighting controller designed by the brand Corsair. This controller allows users to adjust the speed of their fans and customize the RGB lighting in their computer case. Made in China, this accessory is essential for those looking to optimize the performance and aesthetics of their gaming setup. With the CORSAIR iCUE COMMANDER CORE XT, users can take control of their fans' speed and lighting to create a personalized and efficient cooling system for their PC.