Hailea Aquarium Air Pump Air Compressor Oxygen Pump Four Outlet Aquarium Accessories
Model: ACO-9610
Dimensions: 19.5cm x 14.5cm x 9.5cm
Air flow: 1.6 to 10 litres per minute (four outlet)
Noise: <45dB
Power Consumption: 10 Watts
Pressure: 0.015Mpa
Voltage: 110-120/220-220V
Frequency: 50/60Hz
Cord Length: 145cm
Plug:  EU Adapter Plug
How the Hailea ACO Adjustable Air Pumps work: 
The Hailea ACO Adjustable Air Pump range are high quality, single or multi outlet air pumps, designed for pumping air through an air line/s and into a submerged air stone/s. Air is taken in on the underside of the unit and an oscillating diaphragm pushes the air through the output nozzle on the front of the unit. The air-flow
can be easily adjusted by a control on the top of the unit.

Always place your air pump at a height above the level of the water-line in the reservoir. If your air pump is at a height lower than the water-line and there is an unexpected power-cut or trip-out, water from the reservoir can siphon back from the reservoir into the air pump which will almost certainly cause it damage. We   recommend the use of a check-valve (one-way or non-return valve) in the air-line as well to make doubly sure that back-siphoning cannot occur.