What are the two different models of Finder time switches available?
Finder offers two models: the 12.51.8.230.0000 – Digital time switch with daily/weekly programming, and the 12.81.8.230.0000 – Digital Astro time switch. The Astro model includes additional features such as sunrise and sunset time calculation based on location coordinates.
From the official Finder 12 51 Digital Time Switch Dailyweekly Programming manual, page 1
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