Replaces the conventional BC power inflator and back up second stage regulator by combining the functions of both in a single convenient unit. Eliminates need for one hose from first stage. Provides excellent breathing performance without need for in-water adjustments. Power inflation, oral inflation and exhaust trim valve operations remain similar to the standard BC inflator and allow easy single-handed control. Connects to the first stage, giving you both regulator and inflator operations. High flow capacity hose that quickly connects your BC and inflator together. Ergonomically designed inflator & deflator buttons. Free Parts for Life. (Restrictions apply) The Gemini is suitable for water temperatures warmer than 50oF (10oC)