"This Generac Indoor Transfer Switch allows you to safely power essential appliances during electrical outages without the need for extension cords. Connect your portable generator to the transfer switch to power furnaces, lights, refrigerators or freezers, security systems and more. Includes 10 circuits and is expandable to 16 circuits. U.S.A. Circuits qty. Includes 10, expandable to 16, Amps 30, UL Listed Yes, Volts 240, Application Residential, light commercial, Phase Single, Dimensions W x D x H in. 14 3/8 x 3 3/8 x 11 1/2. Compatible with generators with 30 Amp outlet or up to 8000 Watts Connects to existing load center like a subpanel Accommodates Arc-Fault and GFCI breakers to meet current codes Three 15-Amp single-pole breakers, three 20-Amp single-pole breakers, one two-pole 20 Amp breaker and one two-pole 30-Amp breaker Includes all wires, conduit, fittings and wire nuts Requires 60 Amp two-pole main breaker in existing load center not included UL listed"