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DoorKing 1812-089 Plus Surface Mount Telephone Entry System
Surge Protector
Not recommended for freezing climate zones
Additional Features
US Automatic 500016 Circuit Board (Green Board) HySecurity Accessories DoorKing 1812-089 Plus Surface MountUS Automatic 500016 Circuit Board Main circuit board for US Automatic Patriot 1 & Patriot 2 This board also replaces the 500002 board. Please review your manual prior to ordering
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