Tech Research Power Transfer Switch Surge GuardThe Surge Guard line of automatic transfer switches ensures continuous power to your coach by monitoring shore power and automatically switching to generator power when it detects electrical issues that could impact performance of equipment in your motorhome. Provides basic surge protection of 2600 Joules at 76,400 Ampere.Features:Protects RV Bumper To Bumper From Faulty Park PowerOpen Neutral ProtectionReverse Polarity ProtectionTime Delay At Power UpMulti-Mode Surge SuppressionMechanical Interlocking ContactorsUL Approved ATS - Full Transfer Switch RatingLimited 90 Day Warranty Weight: 6.7800 Type: Automatic Function: Transfer Power Between Shore And RV Generator Voltage: 120/ 240 Volt AC Ampere Rating: 50 Amp Terminal Type: Screw Length (IN): 8.84 Inch Width (IN): 5.21 Inch Height (IN): 12.47 Inch Color: Black Mounting Type: Wall