Here are the differences in the x10 motion sensors. All, Hawkeye, Egaleeye and Activeeye. They all support 24 hour motion detection and all support turning lights on when it gets dark and off when it gets light (dusk to dawn). They all use up 2 house codes. The hawkeye is for indoor user only. The Egaleeye and Activeeye are both indoor and outdoor use. The active eye allows you to turn off the dusk to dawn feature thru programming (thus only uses 1 housecode-unitcode).
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