Review on Extech EX411-NIST True RMS Professional MultiMeter with NIST Certification - Premium Accuracy and Reliability by Frank Tyrance

I bought one of these and before I knew it had residual AC signal I was out of the return window. Bought another one, had the exact same problem. Also, the packaging of the new device was sealed, so apparently someone understood this issue and sent the device back earlier. Don't waste your money on this counter, this company has terrible quality control.