Take Bull USB socket as an example:
Directly plug the usb interface appliance that needs to be charged into the USB interface of the socket and it can be used normally.
Extended data
USB socket classification
1, direct usb socket (features: usb socket without buttons, indicator light or indicator light, low cost. )
Because the usb socket market is still in its infancy, and the usb socket standard is not perfect, many low-priced usb sockets on the market are mostly in-line usb sockets. The usb in this socket keeps in contact with the household voltage and keeps running all the time, which is quite similar to the standby TV. The service life is greatly reduced and the safety hazard is great.
2. usb socket with button (features: usb socket with or without indicator light, high safety performance)
A usb socket with a button outside, the on-off of the usb circuit is integrated on a button, and when the button is pressed, the usb is powered on, so that the usb does not have to keep in touch with the household voltage all the time, and the potential safety hazard is greatly reduced.
Baidu encyclopedia -USB socket
Bull switch official website-Bull Cube USB socket