SA170 Zip-Set Digital Wall Switch Timer gives you a variety of options for controlling the lights inside and outside your home. By simply entering your area code, you can use the Timer to automatically turn on your lights at sunset and adjust for seasonal time changes. The SA170 is a great way to secure the perimeter of your home, and its also an intelligent method for conserving energy by automatically shutting off your outdoor lights after bedtime. Additional random or programmable options, as well as a manual control option, make this timer easily customizable to meet your needs.