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In all electronic goods, residual power flows when its power is off, but the plug is not pulled out.
Even if it does not work, about 10 percent of operating power is wasted.
Even though we know about the fact, we often tend not to pull the plug out.
In addition, when charging is finished, there are hassles that we have to check it carefully and pull the plug out.
It eliminates this hassle and saves 10% of power wasted.
When power turns off, the top button of the plug socket lights. The state maintains for 10 minutes,
the plug automatically springs out like toaster.
Cheonan-si, South Korea
Gyeonggi-do, South Korea