Check the listing for details. Mares Rover Octopus - Scuba Diving Octo Regulator Air Source - 416557. Condition: New other (see details). Listed at 156.95 USD. Mares Rover Octopus - 416557MSRP: $173.95 The Octopus Rover guarantees high performance, even during intensive use. The large purge button features a "dynamic hinge" design, which makes it easy to use, even with a single finger. It also prevents free flow in the event of strong currents and is made of durable rubber that can withstand over 113,000 venting cycles. The patented Mares Vortex Assisted Design (VAD) system combined with the Fluid Dynamic Deflector (FDD) allows for natural breathing at all depths. The Octopus Rover's combination of durability and performance make it the ideal regulator for intensive rental use. Includes a rubber hose. Ultralight TechnopolymerAbrasion resistant and affordable, ideal for diving in warm and moderate water temperatures. VAD - Vortex Assisted DesignThe air bypass tube delivers air to the mouthpiece creating a swirling vortex with a low pressure area in the center that keeps the diaphragm down during inhalation, for very sensitive and easy breathing at all depths. Fluid Dynamic DeflectorReceives and properly directs the airflow from the bypass tube to the mouthpiece.