The adjustable water pump is designed fully submersible for both fresh water and salt water. This pump creates a flow of water and aerates the aquarium to simulate the natural environment of an ocean/river. The pump is an indispensable addition to your aquarium, fountain, and more. Submersible Water Pump for Aquarium, Fountain, Fish Pond, etcFlow rate is adjusted by knob in front of the pumpWith 2 suction cups at the bottom and for use in water onlyInput voltage: DC 3.5-9VMoc: 1-3Would flow rate: Max. 200L/H(44GPH)Hmax. : 1.3-4.9ft/0.4-1.5 metersOutlet Diameter: Approx. 8mmDimension(L x W x H): Approx. 3.7x3.3x2.7cm/1.5x1.3x1.1inchUSB Cable Length: Approx. 140cm/55inchMaterial: PlasticColor: BlackFAQ:1. Is there a tracking number for my item? Yes, we ship every order with their tracking number, and you can see the status of the shipment on the corresponding website.2. Is the product the same as the photos? Yes, all photos are real. We took these photos ourselves.3. What size can fit me? We suggest you look at our size suggestion chart below and our product size chart if you have a normal figure. If you have a special figure, please fit in (tell us your height and weight, bust, waist, hip size).4. I am a seller, I would like to buy many pieces of the item, what is the price ? Hi, thank you for your inquiry, if you want to buy large quantity, please send to us, we will give you the best price, thanks!