I keep a garage remote in my car but since we have had a few attempted garage break ins locally, I have plugged my garage door electric plugs, which are in the rafters, into remote control units which plug into the mains then you plug the power cord into them. I keep the power turned off when I don't want to open the front doors.OK its not foolproof, you could still turn the power on remotely, but you'd need to know that you needed to and be blooming close to do it. I tested the remote and it doesn't operate through the closed metal doors, I have to go in through the side door to operate it. Not that there is anything worth nicking except maybe the contents of the freezer.