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Rivelatore da esterno doppio Pir Impact and temperature resistant casing (-35°C to 50°C) Extremely reliable and false-alarm free Dual Optical Filtering System UV protected lens Dual optics (2 dual opposed element sensors) Digital Dual Opposed Detection Multi-level sensitivity adjustment Two operational modes (Bus or Relay operation) Can be used with the Heavy Duty Outdoor Swivel Bracket (SB85).