DUO 2 is a compressor and suction in one with oil-less compressor and two suction pumps of the line, it is the source of clean, pressed, oil-free air and at the same time the source of underpressure for dental equipments and devices. With regard to its parameters and capacity of the air tank of 25 liters, it is suitable for supplying of two dental units equiped with the suction unit. Air produced by oil-free compressor provides a higher degree of hygiene and quality of work of the dentist and does not pollute the working environment by heterogeneous substances.