The Professional Series Dual Detectors ISC-PDL1-W18G and ISC-PDL-W18H are exceptionally suited for commercial indoor applications. The self-locking two-piece enclosure, built-in bubble level, flexible mounting height, and three optional mounting brackets simplify installation and reduce service time. Sensor data fusion technology ensures that the detectors send alarm conditions based on precise information. Microwave anti-masking makes it difficult for intruders to obscure the detectors. Tri-focus optics technology eliminates coverage gaps and responds efficiently to intruders. The powerful combination of unique features in the Professional Series delivers superior catch performance and virtually eliminates false alarms.