Automatically transfers power to your generator during an outage;Designed for use only with KOHLER generators equipped with RDC2 or DC2 controls;Installs indoors or outdoors;Available in service-entrance models;Optional external LED display;Corrosion-resistant aluminum enclosure;5-year, 2000-hour limited warranty;400-amp models available;Volts: 208 V (three-phase);Poles: 3 (three-phase)