To use the PowerLink 4 with an appliance such as a fan, blender, mixer, or lamp, you will need to be sure it has a mechanical switch that allows the device to remain on. The best way to test this is to turn the appliance on, unplug it from the wall, and then plug it back in. If the appliance continues to work, you will be able to connect it to the PowerLink 4 for switch activation.