This Bundle combines six items: TWO Kessil A360X Tuna Blue LED Light; a WiFi Dongle; TWO Kessil LED Light Pendant Gooseneck Clamp/Mounts; & a Reefractometer. 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. 90 Watts: 25% brighter than older versions of the 360. Effective light much greater than a 250 watt metal halide. Note: 90 watts is the maximum output. 30" X 30" coverage area. Variable Color Temperature: Using the two knobs on the top of the light you can tune the LEDs to your desired color temperature. 10000K? 12000K? 14000K? No problem. With the Kessil WiFi Dongle you can control the Kessil A360X Tuna Blue LED Light. 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. The WiFi Dongle plugs into the K-Link port on the A360X lights. We include a a K-Link cable (not pictured) to link your lights together. Having one WiFi connection for multiple lights minimizes wireless interference, leading to a faster, more reliable connection. You will hardly notice the addition as the Dongle is only 2" X 1.25" X .5". The Kessil LED Light Pendant Gooseneck Clamp/Mount is a versatile mounting option that allows you to customize the positioning of your Kessil LED Fixtures. The MarineAndReef Reefractometer is designed specifically for marine and aquarium salt water. The readout is for 0-40 PPT, which is much easier to read than the 1-100 PPT that comes with many refractometers that are for general use. The refractometer also features ATC (automated temperature compensation) so you don't need to adjust your reading.