Equipped with flawless touch control and a vivid color display, the Spectral Controller X is effortless light control at the touch of your fingertips. Its straightforward approach to light control programming allows for endless customization options without the confusion. The sleek, modern design ensures a beautiful and cohesive setup that won't disrupt the look of your aquarium. The new K-Link communication method with the A360X Tuna Sun and A360X Tuna Blue is an upgrade of the old 0-10V Kessil Spectral Controller, allowing users to network multiple A360X lights together (up to 32 fixtures per chain) and set individual groups to run their own programs. K-Link is also a two-way communication, meaning the Spectral Controller X can detect the number of lights in the network, the status of the lights, etc. The Controller X comes with one K-Link port and one 0-10V output port. The K-Link port allows users to connect to the new A360X, while the 0-10V port is for Kessil's 0-10V light fixture (A360WE, A360NE, A80 and A160). With the 0-10V port you need to use the older Unit Link Cable (not included with Controller X). To connect to more than one light you will need an extra K-Link Cable for each additional light. A single K-Link Cable comes with the Spectral Controller X. You can connect an unlimited number of lights to the Spectral Controller X if you have a K-Link Cable linking the lights together. Comes with: Spectral Controller (x1); Magnetic Back Plate (x1); Micro USB Cable (for firmware update)(x1); K-Link Cable (10') (x1); Screws (x2); Nylon Anchor (x2). Manual Mode: tune color and intensity for on demand light customization. Program Mode: features two ways of setting a customized light schedule to match individual tank needs. Maximum of 12 programs can be created.