Power rings were previously one of the seven types of skill rings in O2Jam. It is classified in its own category.
The Power Ring was implemented on January 27, 2006 in the Malaysian version of O2Jam. It has been reported in early 2008 that skill rings emerged (as a hack) in the Philippines.
When a room captain uses a Power ring, other players who have the song already downloaded in their computers but haven't bought yet can enter the room.
It was removed from the Malaysian version of the game due to massive amounts of hackers abusing the ring.