The Mini-Seis III™ is our next generation seismograph. It features over 500 MB of on-board memory, USB support for computer communication and writing data to a USB thumb drive. Operating modes include Waveform, Histogram, Histogram/Waveform and Manual Trigger Modes. A system log tracks when the instrument is turned on and off, changes to the operational setup, and whether or not any triggers occurred during a waveform operation. Options include A-weighting and special ranges. All for a very affordable price which means a great value!