The Oxymax pump is a great air pump from Oase. It is a complete set and includes airline and air stones. It has an adjustable air flow, is quiet and robust and is immediately ready for use. It allows you to be flexible with installation as it can be kept standing or it has a top hook to allow you to suspend it. The air output can be easily adjusted using the dial on the front of the pump and the bubbling pattern can be adjusted using the air diffuser. Plus a pleasantly quiet noise level. Suitable for freshwater or marine aquariums. Comes with a 3 year guarantee.