The WiiM Mini remains powered on as long as it is plugged in. If you need to turn off your WiiM device, unplug it from the power source. Alternatively, if you prefer to put your WiiM device into standby mode, you can configure the standby timing through the WiiM Home app. To do this, navigate to the "Device" tab, click on the gear icon, and select "Standby Mode" to set the desired timing.