◆ Curtain structured infrared Fresnel lens, fir for wall and ceiling mounting ◆ Adopts self-designed DSP chip, totally intelligent ◆ Dual PIR with high accuracy + Intelligent ◆ Digital automatic pulse adjustment ◆ Pet immunity below 30kg ◆ Multi grades of detection range for option. ◆ Bi style temperature compensation, automatic environmental memory ◆ With intrusion direction recognition function.