Check the listing for details. Wave Maker 2pcs 480GPH Aquarium Powerhead Submersible Circulation Pump Saltwater. Condition: New. Listed at 17.89 USD. Features: · FLOW RATE: 480GPH (1850L/H), ideal for 30-60 gal freshwater tank or 20-30 gal saltwater biocube. · 360° ROTATION: Articulating ball joint allows full flow directions to generate waves of water movement in those hard-to-access "dead spots" in your aquarium. · ARTIFICAL FLOW: Imitate the natural flow and greatly increase the dissolved oxygen promoting a healthy stagnant free water environment. · Totally submersible and oil-free motor to avoid pollution to the living circumstance. (Must be totally submersed under water) · Imitate the natural flow to create the similar river environment and greatly increase the dissolved oxygen in water. · Easy to install - just suck the cup to the inner wall, plug in and it works. · NOTE: Do not recommend using with a timer or a controller. Specifications: · Total Flow Rate: 480GPH (1850L/H) · Recommend aquarium size: 30-60 gal freshwater tank, 20-30gal marine tank · Dimension: 2.75 x 2 x 2 inches (L x W x H) · Length of power cord: 6ft · Voltage: 110V-120V / 60Hz Includes: 2pcs aquarium wavemakers/power heads