This model merges two former Poseidon regs; its first stage comes with the former Xstream Dive 90 and the second stage comes from the Xstream Deep technical reg. Approved for diving with Trimix down to 200 m/600 feet. Second stage is non-keyed (can be used over both shoulders) and uses a side-exhaust design that reduces bubble interference. Built in safety valve allows breathing through mouthpiece even at freeflow. Thermo Dynamic Anti-freeze (TDA), uses heat from the water as freeze protection. * Approved to 200 m * Easy breathed - Servo assisted * 5 LP and 2 HP-ports * Trimix and air * Delivered with a 70 cm LP hose