Generac RTSW200A3 200 Amp Automatic Transfer Switch 120/240V Single Phase Rated NEMA 3R 200-amp 120-240-volt single phase nexus transfer switch with service disconnect NEMA 3R rated aluminum enclosure Transfer switch connects through the utility meter for easy installation Engineered with Generac's digital load management (DLM) technology Comes with a 2-year limited warranty