Aeris A1 Octopus is a simple, dependable and rugged octopus regulator. The Aeris A1 Octopus Regulator is a great performer at a great price. The A1 uses a conventional downstream fail-safe demand valve which delivers plenty of air and is low profile and lightweight weighing only 6 oz (170 g). This alternate air source regulator is Nitrox ready to 40% out of the box. The yellow color makes it easy to locate in an out-of-air situation and the extra long hose makes it easy to handle in an emergency. The simple design allows easy maintenance for years of dependable service. Octopus Regulator comes with an Owner"s Manual.