This Ultra Quiet HG-811 Aquarium Air Pump is a perfect tool to improve the health and wellbeing of your fish by dissolving oxygen for small tanks up to 15 gallon, Unlike traditional air pump, Our mini air pump is driven by a thin piezoelectric ceramic plate, no motor or other mechandism that reduces noise, it is very quiet for fish tank to be placed at bedroom, living room and office, Compact design, measures only 2.4 inches diameter, it is super compact, lightweight, ultra quiet, along with long service life, Only 1.5-watt power consumption is very energy saving with flow rate 420 ml/min, it is a great air pump for small fish tanks range from 1-15 gallons and hydroponic system, only for used with mini air stone, not strong enough to power sponge filter and protein skimmer, Comes with all air pump accessories you need: HG-811 Air pump with power adapter, 3.6 ft long air tube, 0.9 inch air stone, double-sided sucker and user manual