![Data-logging Circuit Tester for Power](https://d27wgn5g4t3wja.cloudfront.net/img/765af658-cb51-4e75-8dff-39e8cb653579/275390.png)
Data-logging Circuit Tester for Power
The Log4 USB is a circuit measurement tool which both display accurate readings of voltage, current, and power while also simultaneously logging all measurement data to a MicroSD card and/or the free dedicated PC software. The Log4 USB device is specifically designed to measure the low positive voltages of USB connected equipment with high accuracy.