Honestly, I doubt that there are any MOV's of subsistence in this device. MOV's which can handle major hits would not fit into this outlet. Worse yet, MOV's degrade with each hit and are not great as surge protection in long term use. I use a Brickwall now as my first line of defense as it doesn't degrade (in theory). My best defense is to unplug everything, it's not connected that way. And I am not very good at unplugging everything. I do unplug my very expensive amateur radio gear which is just too costly to keep replacing and it's connected to very high antenna's up on towers which love to attract hits. But I cannot remember to unplug it all
I have been hit several times now as I am up high on a plateau. It gets old! Please do not hit my Model T's!