The Amprobe AM-530 True-rms Multimeter is the fully-featured multimeter of choice for the professional electrical contractor. Measure and verify presence of voltage in order to connect equipment or to perform repairs, run new wiring, check continuity of electrical connections, identify blown fuses, troubleshoot motors or check transformers. The AM-530 features true-rms sensing to accurately measure voltage on systems affected by harmonics, a built in flashlight to detect wire colors in the dark, a "third hand" probe holder and VolTect™ non-contact voltage detection.