This Kessil Spectral Controller X For A80, 360WE & 160WE Series LED Light Upgrade Bundle includes two items: Kessil Spectral Controller X, and the Kessil Power Supply. The Kessil Spectral Controller X is backwards compatible. However, to be used with the Kessil A80, 360WE & 160WE Series LED Lights, you will need a Kessil Power Supply. For the newer lights (A360X and A500X), you will just need to get the Kessil Spectral Controller X. 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.