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Colour : Grey, Material : ABS, Package Content : 1 Piece,Size : 11 x 11 x 5cm, The Dual Monitor Module is intended for use in intelligent, two wire systems, It provides two independent 2-wire initiating, device circuits (IDC), at two separate, consecutive addresses, It is capable of monitoring normally open contact fire alarm, and supervisory devices, or either normally open or normally, closed security devices.