The detector features a grey lens that provides increased white light immunity, way above the requirements defined by the norm (up to 10000 lux). This lens helps to reduce false indication of alarms caused, for example, by: car headlight refraction, the setting sun, lightning or reflective surfaces. The immunity to false alarms can be set at two levels, PIR and MW. The detector operates with a pulse reaction and takes up a single position in the system.