Be confident in your purchase we're an Authorized AquaIllumination Dealer. How cool is that?!?!? Orbit 2 Specs: Dimensions: Width: 8.78 in. (223 mm) Height: 2.83 in. (71.9 mm) Depth: 1.5 in. (38.1 mm) Specifications: Maximum Glass Thickness: 0.59 in. (15 mm) Recommended Tank Size: ?20-88+ gallons Power Consumption: Variable, 25W max Input: 100?240VAC, 50-60Hz, 2A What?s in the Box: AI Orbit? 2 Pump with Integrated Driver Mounting Magnet Power Adapter with Universal Plug Adapter Set Quick Start Guide Orbit 4 Specs: Dimensions: Width: 12.1 in. (307.3 mm) Height: 3.15 in. (80 mm) Depth: 1.69 in. (42.9 mm) Specifications: Maximum Glass Thickness: 0.79 in. (20 mm) Recommended Tank Size: ?20-120+ gallons Power Consumption: Variable, 45W max Input: 100?240VAC, 50-60Hz, 2A What?s in the Box: AI Orbit? 4 Pump with Integrated Driver Mounting Magnet Power Adapter with Universal Plug Adapter Set Quick Start Guide AI Aquaillumination Orbit Flow Aquarium Water Pumps produce a unique type of flow. Circling the aquarium with water movement- like the water that moves within the ocean. Orbit provides a cross-flow current that simulates the tidal flow experienced on ocean reefs that is an excellent mechanism for lifting excess nutrients from the bottom of the aquarium for removal by filtration. Like ocean currents, it is not just one type of flow that makes the reef thrive, but really make your aquarium thrive with flows of all types. When combined with the directional and random flow patterns of our Nero pump line a true recreation of ocean flow can be achieved- powerful, directional, systematic, and chaotic.