Extech DL150 True RMS 110V AC Voltage/Current Datalogger Datalogs up to 100,000 readings, programmable sample rate from 1 second to 24 hours Measure true RMS AC voltage (600V) or current (200A) Readings can be downloaded to your PC via the USB interface and analyzed using the included software or exported to a spreadsheet LCD indicates time/date, current readings and Min/Max Normal, peak and capture (user-specified trigger level) recording modes