The Amprobe® AM-530 auto-ranging digital multimeter is the multimeter of choice for professional electrical contractors. The AM-530 is a True-RMS digital multimeter so it accurately measures voltage on systems affected by harmonics. With its full menu of digital multimeter features, you can use it to: measure and verify the presence of voltage before connecting new equipment or performing repairs, run new wiring, check continuity of electrical connections, identify blown fuses, troubleshoot motors or check transformers. The CAT III 600 V safety rating provides an extra measure of safety for high voltage multimeter applications. Its built-in flashlight helps you see wire colors in the dark and third hand probe holder gives you an extra hand when you need it.