Ring

Rings (or as fans like to call them Power Rings) are objects that appear in the anime series Sonic X and its comic series published by Archie Comics. They are golden rings used exclusively by Sonic the Hedgehog to give himself extra power in battles

Description
The Rings are golden glowing bands, small enough to fit inside the palm of Sonic's hand (and easily drop). These objects contain an unusual form of energy which is hinted to be chaos energy.

When in the hands of Sonic the Hedgehog, he can draw upon their power to temporarily make himself more powerful. This lets him enter "Super Spin Mode" where he performs a more powerful Spin Attack that increases his speed and turns him into a nearly unstoppable projectile. Using more Rings at once boosts his power even further. The Rings are genetically encoded to respond only to Sonic's physiognomy which is why no other is affected by their energy. Regardless, they can still be used as potent power sources for machinery and have their energy conducted through wiring.

As stated by Tails, Rings are produced with the aid of the Chaos Emeralds. While the procedure is not shown, Sonic and his allies usually have a number of Rings ready for deployment, as the Rings are apparently used up after Sonic's usage. Tails' different aircrafts are also stored with Rings which he can eject to Sonic during the heat of battle.

Trivia

 * It is implied by Sonic that Rings may originate from another world entirely.
 * In the comics, another type of Rings appeared in the virtual reality world reminiscent of the original Sonic the Hedgehog video game that Sonic and his friends were trapped in. As demonstrated by Sonic, these Rings do not provide a power boost to him. Instead, they protected the wielder from harm via any attack or environmental obstacle, serving an identical purpose to the Rings from the video games.
 * The usage of the Rings, and Sonic performing a Spin Attack from it, mostly, and coincidentally, acts similar to how the Power Rings were used in the Sonic the Hedgehog television series. In fact, they been conned under the name of Power Rings by the fans