It can be used directly as a USB interface, in order to facilitate us to charge the phone on the socket, you can use the USB charging cable directly without the charger.
Now a lot of switch manufacturers in the production of sockets will increase the USB interface above, with this innovation, people will be full of desire to buy when they buy, because he has created convenience for people, so that everyone is more willing to accept.
The usb in the multifunction socket can be used to charge electronics. For example: to charge mobile phones, tablets, mini juicers, warm babies, etc., it is convenient, and can save the cost of buying plugs, plus now the interface of smart devices used in the family is more unified, avoiding the repeated purchase of plugs, realizing the desire for multiple purposes, very affordable.
The USB on the socket is used for wiring, one end of the cable is connected to the socket, and the other end is connected to the jack of the phone