Main features:

MCU control, resist false alarm efficiently
Double temperature compensation
Pulse count adjustment
Anti white light interference
Anti RF interference (20V/m-1GHz)
Fresnel lens
Wall/ceiling installation
Alarm output N.C. or N.O.
Alarm time optional (3s or 30s)
Intelligent floating thresholds technology
Patent appearance design
SMT manufacture technology with high stability

Technical specification: