The object that gives Green Lantern his superpowers is a ring. In the modern DC Comics origin, Green Lantern power rings are created by the Guardians of the Universe and used by members of the Green Lantern Corps, including Hal Jordan. The ring channels the wearer’s willpower into green energy constructs, allowing the user to fly, create protective shields, communicate across space, and survive in hostile environments.
The ring is more than jewelry: it is a highly advanced extraterrestrial device linked to the Corps’ power system. Green Lanterns traditionally recharge it by placing it in a lantern-shaped battery connected to the Central Power Battery on Oa. The ring’s abilities depend heavily on the wearer’s concentration and willpower, so it does not make every user equally powerful.
A common mix-up is confusing the ring with the lantern. The lantern is the recharging device, while the ring is the object worn by Green Lantern that directly produces the powers. Earlier versions of the character, especially Alan Scott, had a different magical origin, but “a ring” remains the canonical quiz answer.