simplysafe smoke detector每个$29

来源: jan86 2019-10-05 09:31:00 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读: 次 (64 bytes)
有人用它替换中央监控的fire safety monitoring system?

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you can buy battery one for $5.... -borisg- 给 borisg 发送悄悄话 borisg 的博客首页 (0 bytes) () 10/05/2019 postreply 12:31:44

I have a multi family unit that requires centralized fire alarm -jan86- 给 jan86 发送悄悄话 jan86 的博客首页 (0 bytes) () 10/05/2019 postreply 18:36:00

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