Aqua Lung PowerlineThe Powerline is the time proven airway that has been powering Aqua Lung BCs over the years. From its over molded lower unit and stylish hose to its cable activated rapid exhaust, what's not to like? Features: Increased fill rate; now one of the highest air flows in the industry Environmentally sealed unit Integrated hose clips keep the lp hose tucked in alongside Cable activated rapid exhaust at the top, simply pull down on lower unit to dump air