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This is a can simplify the cumbersome steps of the product,In function,it solved the problem can not pull out the plug with one hand. It can adapt to most people's practical habits. To a certain extent, the safety of the product performance has improved greatly, When used in ordinary socket, possible wet hand, get an electric shock, but when using this product is not the case. It is not direct contact to the plug, in use. Press the button of the insulation, the plug will be out. So even if the hand is wet, also won't get an electric shock.
Chengdu University of Technology