Mantus Scuba System is designed to be compact, light and portable. Everything fits into a backpack (included) so you can have SCUBA GEAR with you on every adventure. It is an ideal system for cruisers, live-aboards and is easy to travel with. The small profile kit fits easily into small places on the boat and allows you hassle free diving for all your underwater projects. Feel the freedom of movement of a free diver while breathing with comfortably. (Appropriate Scuba certification/training required for safe use) Mantus Scuba Pack Features: 3.5 Liter Aluminium Tank Can be pressurized to 3000 PSI First Stage Yoke Regulator Classic piston regulator with the maximum working pressure of 3500 psi (232 bar) Second Stage Regulator Main Non-adjustable second stage Comfortable silicone mouthpiece Underwater pressure gauge Light weight and Ergonomic Harness Back Pack Heavy duty, features drain holes for storing wet gear and a water proof compartment.