Surge protector on sale for south of border travelers

....... Includes park power diagnostic light, as well as boost indicator light, spike and surge protection and polarity and ground test functions..I

http://www.pplmotorhomes.com/parts/rv-power-cords/30-amp-autoformer.htm

I used this on my TT primarily, but also had a portable 30a surge protector that mainly sat in the storage bin. You know...Better to have and not need than to need and not have.