there is a device, a small monitor using battery

来源: y2001 于 2008-12-10 08:31:19 [] [博客] [旧帖] [给我悄悄话] 阅读数 : 0 (165 bytes)

you can put outside the door hide in a planter, turn it on in the evening, whenever somebody walk close, it will make a loud alarm noise, enough to scare a teenager.

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• Do you have the name of this kind of device? Thanks. -picturequestion- ♀ 给 picturequestion 发送悄悄话 (0 bytes) () 12/10/2008 postreply 09:31:36

• something like motion detecting alarm, or you can buy -y2001- ♀ 给 y2001 发送悄悄话 y2001 的博客首页 (111 bytes) () 12/10/2008 postreply 09:48:40

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