3ds Max / 2014 / 2017 / V-Ray 3.4.01 / OBJ / FBX / STL

The M314 Motion Tracker,[2] also known as the Motion Scanner,[3][4] was a simple motion-detecting surveillance device. Essentially, it was a high-powered ultrasound scanner that used doppler-shift discrimination to filter out moving objects from stationary background and then displayed them on the M314's monitor as a series of contours of probable loci.