This bundle combines the Kessil A360X Tuna Blue LED Aquarium Light with the Kessil WiFi Dongle & Mounting Arm. With an output of 90 Watts, the effective light of the A360X is greater than a 250 watt metal halide. It covers a 30" X 30" coverage area. The Kessil A360X Tuna Blue LED Aquarium Light works seamlessly with the Kessil WiFi Dongle to control the intensity and color mix of the light throughout the day and night. Using the free app and a smart phone you can control multiple Kessil X-Series lights that are connected together with the K-Link Cable. Having one WiFi connection for multiple lights minimizes wireless interference, leading to a faster, more reliable connection. The app gives users access to advanced manual controls and program customization, as well as the ability to sync groups of lights. Features include full color control, acclimation, lunar cycle, weather effects, and more! The Mounting Arm is for mounting the Kessil to the back of your aquarium. The Mounting Arm height is adjustable, and with the A360X the light can be up to 13 inches from the top of the water and from 11 to 13.5 inches into the tank.