The ST01 7-Day Programmable In-Wall Timer from Intermatic is a heavy-duty 15 Amp lighting control that can be installed in both residential and light commercial applications. Users can program up 40 ON/OFF events each week to automate routine lighting schedules and improve energy efficiency within the home. The ST01 simplifies everyday use with a convenient Astronomic feature, which allows homeowners to automatically set ON and OFF times throughout the year based on geographic dusk and dawn patterns. Similarly, the in-wall timer includes an automatic Daylight Saving Time (DST) adjustment feature, which keeps schedules in sync as the seasons change without requiring additional maintenance. Perfect for entryways, garages, landscape lights, attic fans and more, the ST01 In-Wall Timer offers an easy-to-use interface that makes programming schedules simple for homeowners of all technology backgrounds. The control can be installed in either a single or 3-way switch configuration, as well as paired with a variety of lights, including incandescent, fluorescent, CFL and LED. No neutral is required, making the ST01 an ideal retrofit solution. Color: White/Plastic.