Featuring built-in PIR and microwave detection sensors and tri-focus optics technology, the ISC-PDL1-W18G Professional Series TriTech+ Motion Detector from Bosch uses optics with three focal lengths for long-, medium-, and short-range coverage. Its 90 field of view covers a 60 x 80' area, or a narrowed 25 x 33' area. Sensor Data Fusion technology analyzes signals from all five sensors including two pyroelectric sensors, a range adaptive finder, a room temperature sensor, and a white light level sensor to provide accurate detection. The detector adjusts its sensitivity to compensate for weather, ensuring accurate operation in varying weather conditions, and features self-adjusting LED brightness to automatically adjust to surrounding light levels. There is a blue LED that indicates an alarm condition and activates during a remote walk test. The detector is immune to drafts, insects, and small animals under 10 lb, helping to reduce false alarms. Installation is quick with its self-locking enclosure and built-in bubble level. PIR motion sensor with microwave detection technologies Microwave noise adaptive processing adjusts to background disturbances to help reduce false alarms Range adaptive radar lets the microwave transceiver automatically adjust its detection thresholds based on input from the PIR sensor to reduce false alarms from Doppler radar Microwave anti-mask function allows the detector to send a supervision-trouble signal if microwave reflective material is placed within 1' of the detector 90 field of view covers a 60 x 80' or 25 x 33' Tri-focus optics with three specific optic focal lengths (long-, medium-, short-range) for accurate detection Active white light suppression measures light intensity and eliminates false alarms Dynamic temperature compensation adjusts sensitivity for use in varying weather conditions Self-adjusting LED with remote walk test function via DIP switch Alarm memory flashes the alarm LED to indicate stored alarms across multiple units (available separately) Solid state relays send silent alarm output signals for discreet operation Draft, insect, and small animal immunity reduces false alarms Remote self test and trouble memory Input power supervision activates the trouble relay when power is below 8 V Cover and wall tamper switch detects and sends an alert if the detector cover is tampered with or removed, or if the detector is removed from the wall Self-locking enclosure with built-in bubble level