Generac’S 6853 Homelink™ Upgradeable Manual Transfer Switch Is A Pre-Wired Electrical Device That’S Installed Next to Your Home’S Circuit Panel. During An Outage, It Delivers Power to Hard-Wired Appliances (Such As Furnace, Well Pump and Lights) With The Push Of A Button, Safely and Easily – Eliminating The Need For Multiple Extension Cords. It Comes Standard With 8 Circuits, Expandable to 10 Circuits. When You’Re Ready to Install An Automatic Home Standby Generator, A Certified Electrician Will Change Out