Outdoor lights controller AproLink® 2642 OL is equipped with built-in electronic quartz stabilized clock. There is also a built-in table to calculate the time of sunset and sunrise for each day of the calendar year. The timing of sunrise and sunset is calculated according to solar equations to within 5 minutes. The controller enables correction setting because of the differences of sunrise and sunset in different geographical regions. The controller has two output relays for control of two circuits, which are called permanent zone and economic zone. The relay of the permanent zone is switched on during nighttime, while relay of the economic zone is switched on for several hours after sunset and before sunrise. There are several periods preset in the controller, such as Christmas, New Year the period around May 24, and other optional, when the economical zone is switched on all night. AproLink® 2642 OL is with 5 years warranty.