>>10still sounds like a snake oil
"The EMP Shield can see and protect all the electronics and equipment connected to your electrical system. This is accomplished by shunting (shorting) the over voltage coming in from the Grid and the voltage surges that are collected within you home. Whether the electrons are collected in the home or attempt to come into the electrical system from outside the home, the EMP will see the surge and shield your electrical system, smart meter, and all devices plugged into your homes system. The EMP Shield reacts in less than 1 billionth of a second. Since the shunting is completed incredibly fast, the over voltage is drained away from the equipment before the voltage can rise high enough to damage any equipment. We call this new technology SightSpeed™"
doubt it could protect even from prankers with EMP gun.