Hydrosubsidium Universal Aqualung

The Hydrosubsidium Universal Aqualung is a piece of equipment in.

Overview
The Hydrosubsidium Universal Aqualung is an advanced type of rebreather that can harvest oxygen from water, but is recommended for use only 10 meters below the waters surface maximum.

They were originally designed for use by workers, but proved too expensive so they were marketed instead as a recreational tool for the wealthy.