Testboy-312-Digital-Multimeter-with-USB (Universal Serial Bus)-Interface-Testboy-312-P-The-Testboy-312-is-a-Digital-Multimeter-with-USB (Universal Serial Bus)-Interface-particularly-convincing-by-its-high-accuracy-in-measuring-The-extremely-effective-measuring-procedure-prevents-measuring-errors-in-the-case-of-non-sinusoidal-or-non-linear-curves-In-addition-it-also-has-important-functions-such-as-relative-Min-Max-&-frequency-measurement-&-a-USB (Universal Serial Bus)-interface-through-which-all-measurement-results-can-be-evaluated-using-Windows-sof