I've owned several of these for years and they protect your home, vehicle, or generators from damage caused by electromagnetic pulses and lightning. EMPShield is are has a 14% off sale today and the link in this post provides an additional $50 per unit by using the discount code of delgue. The 14% off expires today but the code will continue to work. These devices are cheap insurance for those wanting to protect their homes, vehicles, generators, and other electronics or solar.
https://www.empshield.com/?coupon=delgue