Feature: 1. 360° rotation flow directions make it easy to stir up small particles and leftover food to be picked up by the filter eliminating dead spot. 2. There is an extra strong holding suction cup to prevent it from falling off, ensuring the pump is positioned exactly where it needs to be to easily direct the flow of water. 3. Restores water flow, raising the water surface and increasing dissolved oxygen so fish and corals can thrive. 4. Powerful flow to simulate natural waves, powerful water thrust, better water circulation and clearer water quality. 5. This wave pump is very quiet when working and will not affect the aquatic life in the fish tank. 6. We have both single-head and double-head models, both for freshwater and saltwater, suitable for all kinds of fish tanks. Specification: Features: 360° rotation flow directions make it easy to stir up small particles and leftover food to be picked up by the filter eliminating dead spot. There is an extra strong holding suction cup to prevent it from falling off, ensuring the pump is positioned exactly where it needs to be to easily direct the flow of water. Restores water flow, raising the water surface and increasing dissolved oxygen so fish and corals can thrive. Powerful flow to simulate natural waves, powerful water thrust, better water circulation and clearer water quality. This wave pump is very quiet when working and will not affect the aquatic life in the fish tank. We have both single-head and double-head models, both for freshwater and saltwater, suitable for all kinds of fish tanks. Specifications: Model: RS-108A\RS-109A\RS-208A\RS-308A Color: black Material: plastic Voltage: 220-240V\50Hz Power: 6w,12w,12w,24w Flow rate: 3000L\H,6000L\H,6000L\H,12000L\H Package size: RS-108A: 17 * 10.6 * 9.7cm ; RS-109A: 17 * 11 * 10.5cm ; RS-208A: 17 * 11.4 * 11.4cm ; RS-308A: 17 * 14 * 14cm Package weight: RS-108A: 360g ; RS-109A: 480g ; RS-208A: 480g ; RS-308A: 770g Package List: 1 * Fish Tank Wave Making Pump Package List: 1 * Fish Tank Wave Making Pump