The Openwater Regulator Package is a Dive Rite RG3100 primary first stage, a second stage on a 40-inch hose with an underarm swivel, and a backup regulator on a 22-inch hose with a necklace, plus a 2-inch face SPG (choice of PSI or BAR in white or black face) on a 26-inch HP hose. The regulator set up is designed to keep hoses from dangling and also to maximize diver comfort. The 40-inch hose on the primary regulator routes under the diver's arm, lies flat against the chest, and neatly joins the second stage with a 90 degree angle adapter, reducing mouth fatigue. The secondary regulator is tucked safely under the chin, allowing immediate access. The SPG is clipped to the waist D-ring. This configuration is very streamlined and efficient. The package also includes a DIN-to-Yoke adapter and comes completely assembled, you need only add the low-pressure inflator hose that comes with your BC in order to be ready to dive.