The switch of the socket indicates whether the red dot is on or off.

If you see the red dot is open, if you don't see it, it is closed.

The red button is actually an over-power protection button (specification: overload protector, reset button). Under normal use, when the standard maximum power exceeds 2500 w, the red button will automatically rebound, cut off the power supply, and will not start too many fire accidents. At this time, if the power supply is reduced, then press the button and the socket can use electricity normally.

Extended data:

This red button will automatically pop up and cut off the power supply to ensure that there will be no fire and other accidents caused by excessive power. At this point, if the power of the electrical appliance is reduced, press this button again, and the socket can be electrified normally.

When the switch is turned on, there will be a little red dot on it, indicating the open state, so many switches are usually turned on and off according to this little red dot position.