Aqua Lung Pro HD BCD i300C Dive Computer Titan / ABS Regulator Set Titan Scuba Regulator Uses a balanced-diaphragm mechanism resulting in ease-of-breathing and consistent performance while environmentally protecting the internal parts Knife is sold separately Aqualung i300C Computer Air and Nitrox modes for a range of dive situations with Effortless operation with bluetooth Pro HD BCD wrap-around jacket with weight integration, will hold up to the rigors of salt and chlorine and retain its good looks ABS Octopus The ABS Octopus combines good breathing performance with the benefits of a low profile body style