This General Hydroponics GH2716 Dual Diaphragm air pump is manufactured exclusively for use with hydroponic systems. It features four adjustable 1/4-inch outlets and a standard 3-prong AC power cord. These Dual Diaphragm pump outlets can be split off twice to power up to eight waterfarm units at a time. With a high output of 20 liters per minute (roughly 320 gallons per hour), it operates at 8 watts and 120 volts. It is extremely quiet and one of the few most reliable air pumps on the market today.