The Extech EX205T is a True RMS digital multimeter, which provides truer AC readings when measuring distorted or non-sinusoidal waveforms and noisy signals. This model is also auto ranging, which means it automatically displays readings with the proper decimal place location and maximum resolution. Featuring a large 2000-count, backlit dual LCD with easy-to-read digits, this multimeter measures: AC/DC Voltage, Resistance, Diode Test and Continuity. The meter also makes use of a number of functions including input fuse protection, max hold, auto power off and data hold function. Product has a CAT III-600 Volt safety rating.