Outdoor Sensor motion detector The iHF 3D, the first high-frequency motion detector for outdoors, is a technological quantum leap. The use of intelligent high-frequency technology puts an end to inadvertent triggering once and for all. And the neighbour’s cat or other stray animals leave the iHF 3D cold too. Because the high-frequency motion detector confidently distinguishes between people and animals. Added to this is the high-precision, intuitive adjustability of the detection zone.