Oase Oxymax 200 aquarium air pump. 
3.5w
Max flow 200lph
Fully adjustable using variable control valves.
Including 2 x2m airline hoses & 2 x  innovative air diffusers. 
Multiple mounting options
3 year guarantee 
The ventilation pump reliably supplies aquarium inhabitants and plants with oxygen. The air pump can also be used for decorative purposes (air bubbles, waterfall effect). The air output volume and bubbling pattern can be individually adjusted. The ventilation pump runs quietly and is very robust. It can be used standing or suspended and is suitable for freshwater and saltwater aquariums.