Knight Surface Contact is suitable for double doors with MID, panels. This is compatible with all mainstream UK control panels and includes both EOL and alarm by-pass resistor options. It includes resistors compatible with: Honeywell, Ademco, Orisec, Scantronic, Menvier, Texecom, Pyronix, HKC, Castle, Aritech, DSC, RISCO (Gardtec), Guardall and inner range control panels. Can be turned into a grade 2 device by simply using the header provided.