ESS Gecko ground vibration logger. Includes audible and visible alarm. Will operate continuously to supplied battery and solar panel. 32bit ADC 3 axis vibraphone built in. Includes GPS receiver for accurate timne stamping and location information. Will record PPV excedence data for assessing vibration of structures. Will record 1 year of data at 100sps. Data format Miniseed, industry standard for seismic data. Will timestamp alarm events with waveform and frequency data.