Adjustable aquarium air pump attributes:
Thickened ABS plastic seal to while effectively isolating noise. Four raised rubber feet cut off the noise transmission path. It makes less noise than a refrigerator running indoors. If you need more silence, you can put a towel under the air pump. 
Sufficient air volume: Maximum air flow:100 GPH; Power: 6W. 70~100gallon fish tank is suitable. 
High Quality Guarantee: To get the warranty, please contact the seller to solve your problem, thank you. 6w include the accessories in the picture, there is 1 air pump, 2 hoses and 2 air stones . 
COMPACT AND LIGHTWEIGHT: Measures 6"L x 3.4"W x 2.2"H. Small size, does not occupy the space of the fish tank. Very suitable for use in small fish tanks. 
Using the latest power system, the volume is designed to be very compact, but the oxygen output is increased. A variety of specifications and accessories can be selected according to needs