Specification: Type: Fish Tank Pump Material: Plastic Color: Black Size: 10.5 x 7.6 x 5 cm Power Cable length: 70cm Displacement: 3.5L/min Power: 5W Voltage: 110/220V 60Hz Water Type: All Water Types Noise: 2.2db (A) Occasion: Aquarium, Home, Fish Tank, etc. Package Includes: 1 x Double Hole Air Pump 1 x Bubble Tube(2M) 2 x Air Stone How to use it: 1.The voltage and the frequency of the air feed pump using must be meet requirements. 2.The position of placing the air pump must be higher than that of the aquarium, which can avoid the water flowing into the inside place of the machine following the exhaust pipe. 3.Connect the gas piping to the air outlet of the air pump, the uniformly distribute the vesicle stone in the aquarium, switch on power supply and the air pump will be air-entrapping and oxygenation 4.You can choose single air outlet or double air outlet depend on the oxygen demand to reach the ideal air supply and oxygenation. 5.The filtration cotton of the air pump and the vesicle stone must be washed and replaced in every three months. 6.The air pump should disconnect with the power supply, and placed in the dry environment when do not used. Note: The air pump can not be used in water or outdoor. You should remember firstly taking out the power supply when it is dropped into water because of careless. You should remember firstly taking out the power supply when find it has the phenomenon of leakage of electricity, and you can use it after check out the reasons and repair it. You can not use the air pump under the temperature of zero. HIGH-PERFORMANCE AIR PUMP ENSURES A HEALTHY AQUARIUM - The pump absorbs the outside air and sends it inside the tank via an outlet. Due to this, the aquarium gets oxygenated water which keeps the marine life healthy. It is perfect for aquaculture oxygenation, high-grade aquarium, and spout decoration. It helps to make the environment healthy for your fish. AESTHETICALLY APPEALING AND PRACTICAL DESIGN - The silicone tubes and air stones carry the oxygen and release it into the water in the form of bubbles. Thus the unwanted carbon dioxide is removed from the aquarium without any inconvenience. DUAL PUMP OXYGENATES TWO FISH TANKS SIMULTANEOUSLY - Fish tank bubbler is equipped with a dual-headed pump which is attached to two vents. With 2 air stones and 1 silicone pipes that come included in this pack, you can supply fresh oxygen to two aquarium tanks simultaneously. The fish in the tank gets to breathe fresh, oxygenated air. CONSUMES LESSER POWER - Unlike ordinary air pumps which comes with just a single pump, this aquarium pump comes with 2 heads. So you can use two air stones separately in two different tanks at the same time, yet you will receive reduced electricity bill. The outlet hole is big enough to allow steady air seep in. WIDE APPLICATION - The main purpose of the aerator is to add fresh oxygen and water movement into the tank. However, this oxygen pump allows for a maximum flow of 4.5 L/min making it ideal for 5 - 40 gallons saltwater or freshwater fish tanks.