... Main Applications and Features Realization of Various Seismic Methods; Surface wave, high-density seismic imaging, pulse measurement, ... touch panel directly manipulated. Realization of Various Seismic Methods; Surface wave, high-density seismic imaging, pulse measurement, refraction, ... : USB disk, or adopting mobile hard disk drive, USB mobile drive, etc.Frequency Response Range: 0.1Hz~4kHzNoise: ...