Improper sensor?

Improper sensor?

UNITEC - 46777 - Smoke detector - Photoelectron - CE certified - White - 4 Pack (Germany Import) (Tools & Accessories)
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Customer Review

Attention this detector looks like two drops of water Zenitech HS-103 which was the subject of an alert in 2010 because of dangerousness:
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I recommend !! 17 1 Rank: 4/5
May 4
it heats! 2 Rank: 5/5
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Lack of precision 6 Rank: 3/5
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