You may have seen the word "Cascading" in the pixel LED controller's user manuals . We think this function of the pixel LED controller should called "Networking" .The system can be called as a "Cascading" system. We are connecting pixel LED controllers to gather to get a synchronized playback from each controller in the network . The amount of pixel LED controllers that can be networked depends on the controller model (Read the controller user manual). The first pixel LED controller in the network is called "Master" controller . When networked , The button functions on other controllers will not work . Only the master controllers button functions will work .