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Review title: Previously returned item
Product review: I received and installed the First Alert SC9120B alarm yesterday. I noticed when I first opened the box the alarm was contained in that it was not covered inside the dust cover that was used in the Kidde units that I had purchased through Amazon. Additionally, as part of the post installation checks, a green LED is supposed to be lit and visible through the 'POWER' hole of the unit, indicating the unit is operational. When I first checked, I did not immediately see the lit green LED but after a more concentrated effort saw that the LED was lit but through the space surrounding the 'TEST/SILENCE' button. While it 'appears' that the unit is functional, I'm not sure that the LED had gotten dislodged from where it is supposed to be installed within the unit, i.e., visible through the 'POWER' hole.Also, since the alarm was not shipped covered in the dust cover, I suspect that either the manufacture failed to use the cover or I received an alarm that had previously been returned.
