The Westek timer requires reading the instruction to set up, but once it's set up it remembers the settings even if it is unplugged and stored for several weeks. Therefore if your power goes out this digital timer will keep the correct time until the power goes back on and your times are still being followed I like the battery life and I like the small size which allows both receptacles of an outlet to be used. Actually I liked it so much that I bought another identical unit!!
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