It's generally going to be easier to disable the signal circuits on the appliances than to jam them. Either wrap them in foil, disconnect the circuits, or wait

It's generally going to be easier to disable the signal circuits on the appliances than to jam them. Either wrap them in foil, disconnect the circuits, or wait for some brave soul to figure out what to break for it to stop working. That being said, jamming is relatively easy, just saturate the channel you want to jam with noise. That will also probably kill your cellular connection though.