This is the Apeks MTX-RC Cold Water Compatible Scuba Diving Octopus Features:- Yellow highlights for visibility in an emergency- Protective bumpers to protect the second stage from impacts and scratches in the most vulnerable places.- Ergonomic and simple to use venturi lever.- Oversize breathing effort adjuster makes adjustment easy in cold water whilst wearing gloves.- Large purge button.- Reversible second stage for either a left or right hand gas supply configuration.- A heat exchanger (patented) dissipates the cold caused by gas expansion while drawing in the warmth of the ambient water for a more comfortable breathe. Go warm, go cold, go deep, go anywhere. Enjoy control in the extreme with the MTX-RC scuba diving regulator. Combining rugged, military grade engineering with the super-smooth breathing experience that Apeks regulators are renowned for, the MTX-RC is the regulator that lets you explore more.