The rings of the Green Lantern Corps allow their bearers to travel very quickly across interstellar distances, fast enough that they can efficiently patrol the universe. They allow the wearer to survive in virtually any environment, and also remove the need to eat, sleep and pass waste. The rings can translate practically any language in the universe. They possess powerful sensors that can identify and analyze objects. Lanterns are granted full access to all Guardian knowledge by their rings through the Book of Oa.