ARITECH pir motion detector, 11 curtains 20 m and central curtain 60 m long range. grade 2, range / field of view: 86º / 20 m - 5º / 60 m, directed dsp algorithm. enhanced verified vector signal processing (ve2), 3 selectable alarm sensitivities. self-test with relay and led fault output, opening and wall tamper, outputs: alarm (nc), tamper (nc) and fault (nc).