Product details:

General Tools Vibration Meter w/datalog SD Card - VM8205SD Product Features Accurately measures a machine's acceleration and velocity to determine if it is within operational parameters. Vibration probe measures acceleration or velocity. Included magnetic base facilitates attachment of probe to metal parts or machine housing. Big (2.5 in. diagonal) front-panel green backlit LCD is easy to read. Displays maximum and minimum readings and holds any RMS reading. Automatically logs measurements at sampling time settable from one second to one hour. Also supports manual data logging and changing of SD card storage location.