If you live in a world , ( or know some one who does ) who needs to keep the lites on even if the utility company does not keep the power on. You can keep the lites on, saving money, doing the work yourself. First click on over to www.Reliancecontrols.com, click on any of the buttons like : Why do I need a transfer switch, and let the learning begin! Then clicking on the "Product Selector" will step by step walk you through the selection process. Clicking on the "Product Selector" button will show product to help you moniotr flood, power, and other problems in your life. All these products are available for special order from your Home Depot store. Helping show again that there really is more saving and doing available at Home Depot if you know where to look!