The KX15DT features Dual element pyro-electric sensor with X-band DRO based microwave both of which need to be triggered to set off the Alarm, this reduces the risk of false alarms. Microwave - orange, PIR - green, alarm - blue With Blue Wave Technology (BWT) and digital temperature compensation the detector will adjust its sensitivity, further enhancing the detectors immunity to false alarms and environmental disturbance. 15m Volumetric detection coverage. Ideal for protection of rooms and offices in commercial environments. 3 Different frequency bands to avoid interference between detectors are installed in the same room.