Feature: 1. Single hole design with 4W power and huge capacity, it can easily adapt to fish tanks of different depths. 2. Multi‑stage internal muffler can achieve extremely low mute operation, eight stable feet, shockproof rubber pads help reduce noise. 3. Adjustable knob design, the air volume output can be adjusted by resistance according to the size of the fish tank and the air pump. 4. Uniform and fine air venting, it is power saving with large output and longer working time at the same time. 5. This air pump is suitable for many kinds of fish tanks and also convenient to operate. Specification: Condition: 100% Brand NewItem Type: Air PumpMaterial: PlasticColor: As Picture ShownPump Length: Approx. 13cm/5.1inPump Width: Approx. 9cm/3.5inPump Height: Approx. 5cm/2.0inPower Cable Length: Approx. 105cm/41.3inHose Length: Approx. 143cm/56.3inAir Stone Diameter: Approx. 4cm/1.6inWeight: Approx. 620.0g/21.9ozRated Power: 4W Oxygen Amount: 3.7L/min Air Pressure: 21Kpa CN Plug Standard Rated Voltage: 220V/50Hz US Plug Rated Voltage: 110V/60Hz Suitable Pet Types: Fish Tanks, Aquarium Product function: Silent aeration pump effect: Three-layer silent design 30DB bedroom-level silent effect Huge capacity easily adapt to fish tanks of different depths. Uniform and fine air venting, it is power saving with large output and longer working time at the same time. . Package List: 1 x 812 Air Pump1 x Check Valve1 x Hose1 x Air Stone Note: Dear customer, please rest assured to buy without worrying about the plug adaption. We will provide an adapter for you according to different country standard for ensuring its normal use.