The Halcyon Aura Second Stage (Yellow Edition) is a simple, compact and highly reliable breathing solution designed for divers who want a dependable octopus/backup or a ready-to-dive second stage. Its smooth, consistent airflow provides natural breathing comfort, making it ideal for recreational diving, training setups, rental gear or as a backup regulator in more advanced configurations.

Key Features:

• Classic non-adjustable downstream valve design — proven reliability in all common diving environments.

• Pre-set inhalation effort — factory tuned for optimal performance without needing adjustments.

• Air Control Vane (ACV) — switch between “dive” mode for maximum support and low-flow mode to reduce free-flow risk.

• Compatible with up to 40% Nitrox — ready for enriched-air diving.

• Compact, durable and lightweight housing — easy to use and maintain, ideal as a backup or rental regulator.

• Comfortable mouthpiece included — reduces jaw fatigue and increases long-term comfort.

Why Choose the Yellow Edition?
The Yellow Edition stands out as a reliable, easy-to-spot octopus option, ideal for emergency use and training. Its simple, proven mechanism and stable performance make it a trustworthy choice for divers of all levels.