I looked at the site and it says its a Camco 55310 Power Defender Circuit Analyzer.
Don't think it gives the same protection as the higher priced protectors .It says its an Analyzer??
i have a 50Amp EMS Surge Protector hard wired in the RV.
Don't like the ones that hang off the post , too much money hanging that can just disappear .
When it comes to protecting whats inside your RV I would not go cheap, electronics are not cheap to replace or repair.