Features: 1) Dual quadruple PIR + MW + intelligence 2) Adopts self-designed DSP chip with patented frequency adjustment calculation technology 3) Japanese imported optical filter, with miscellaneous light resistance up to 99% 4) Environment recognition, temperature compensation and moisture prevention function 5) Anti-stranger light 6) Remarkable function of pet immunity below 35kg 7) MW anti-masking function; anti-masking distance of 15-20cm 8) MW send with time stamp, enable max. 4 MW detectors installed in the same room at the same time 9) Can change of detection model 10) For indoor or outdoor use Specifications: 1) Frequency: 315/433MHz 2) Anti-RF/EMI: >10V/m, 10MHz-1,000MHz 3) Operation voltage: 9-150V/DC 4) Anti light inference: 15,000 LUX 5) Anti-masking method: active infrared transmission