1. The astronomical timer automatically turns on/off at the preset sunrise/sunset time according to your location. You dont need to adjust the timer to keep up with the sunrise/sunset time change. 2. Latitude setting range: 0 ~ 70 degrees north/south latitude. (accurate to 1 degree) 3. Longitude setting range: -180 degrees east/west longitude ~ 180 degrees. (accurate to 1 degree) 4. Time zone range: 12 ~ -12, positive numbers represent the Eastern time zone, and negative numbers represent the Western time zone. 5. Built-in perpetual calendar (25 years), from 2017 to 2042. 6. 12/24 hour system conversion. 8 groups of program settings can be changed or not according to the astronomical time. 7. The sunrise and sunset times can be automatically adjusted according to the set longitude, latitude, date, and time zone. 8. Power supply voltage: 85-265VAC
