Tech Research Power Transfer Switch Surge Guard w/ ATS Power quality in RV parks is affected by electrical loads, weather conditions, faulty wiring, undersized, deteriorating or mis-wired electrical connections. Due to the increased sophistication of high-end motorized coaches, the additional monitoring and diagnostic features plus the benefits of a Surge Guard transfer switch are a plus for some RV owners. Features:RVC Communication Allows Instant Display Of Voltage, Current And Fault Conditions On An RVC Compatible DeviceProvides The Following Protection: Multi-Mode Surge Suppression (Fuse Protected), Mis-Wired Pedestal, Open Neutral, Open Ground, Reverse Polarity, High And Low FrequencyOptional 2-Line Plain English Display With Continuous Visual Indication Of Source Voltage, Load Current Or DiagnosticsLights On Front Of ATS Indicate The Presence Of Input Power For L1 And L2Transfers To Generator Power Automatically When Energized After 30 Second Delay In Generator ModeLimited 90 Day Warranty Type: Automatic Function: Transfer Power Between Shore And RV Generator Voltage: 120/ 240 Volt Ampere Rating: 50 Amp Terminal Type: Screw Length (IN): 5.21 Inch Width (IN): 8.84 Inch Height (IN): 12-3/4 Inch Color: Black