The Octopus XS2uses the same casing as the XS2 model, the only difference being the yellow front cover.The hoseis also yellow andis longer(100 cm against the standard 76 cm).All the mechanics are identical to the XS2model and consists of adownstream side valvesystem, withadjustable orifice, simple and extremely reliable. A flow of pilot air is channelled to the mouthpiece by injection,enhancing the performance. The upper part of the body hasa flow deviatorthat acts on the Venturi effect, withdive/pre-dive function. Constantly reviewed over the years, this regulator has lots of admirers in the world due to the fact thatit is extremely simple and strong, features that make it easy to use and result in low-cost maintenance. In any case, performance levels are high, although the calibration is regulated so thatthe inhalation effort is slightly greater than on the XS2, to prevent any free-flow possibility when it is used as a spare regulator. The air supply pressurecan be adjusted between 9 and 10 bar, perfectly suited to all the Cressi first stages.