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People will unplug when going out for saving energy. We bend over,hold the plug and pull it out.When getting home,we bend over again plug in it.For most people,it's hassle to do this repeated action. On the other hand,many experts point out that if you unplug too many time.Socket port will pile up the dust,it will cause bad connetion even bringing about accident.To solve theese question.We combine switch with socket.When going out,just turn the socket right,it will turn off.You don't need to bend over agian,just by your feet.If you don't use theese electrical equipment.Pull out the plug,and push socket right.The dust will not enter in port.
China University of Technology