Features: -Propeller design, more flow. -360 degree rotation to adjust flow in any direction. -Articulating ball joints for versatile directions. -High-quality machine core, seawater and fresh water are applicable, more power saving and quiet. -This item can be used to improve oxygenation as well as to let your fishes, corals and other aquatics enjoy a vital and energetic ocean-like circumstance. Really an inexpensive way to improve water movement especially for saltwater coral, reef or fish tanks. Specification for JVP201A : Max Flow Rate:6000L/H Power: 12W Voltage: 220 - 240V/50 Hz Weight:0.5kg Specification for JVP202A : Max Flow Rate:12000L/H Power: 24W Voltage: 220 - 240V/50 Hz Weight:0.8kg Included: 1 x Pump Wave Maker