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Plug is a very small thing, but it is hard to do by vulnerable groups(Include: the blind, the eye farsightedness, epilepsy patients), as the jack is very small, it is hard to plug correctly.
To solve this problem, designed this socket. It likes a funnel, works as the funnel, it can easily "leak" the plug into the jack by rotating. In bad light circumstances, the two illuminant rings play leading role, so it locks the location of the jack and the socket easily.