Arduino+Relay+Wifi

Hello

Im trying to turn on/off a 220v speakers, with wifi.

The thing is, I dont want Arduino to be conected to the computer. So, is there any way arduino can be ON, even if the speakers are OFF.

Thanks!!

You need to have a power supply for the Arduino, which can be batteries or mains.
The Arduino can operate a relay switching the 220V to the speakers on/off.