Two powerful tools in one. The Fluke 1577 insulation multi-meter combines a digital insulation tester with a full featured, True-RMS digital multi-meter in a single, compact, handheld unit, which provides maximum versatility for both troubleshooting and preventative maintenance. Whether you work on motors, generators, cables or switchgear, the Fluke 1577 insulation multi-meter is ideally suited to help you with your tasks and at a cost that is far less than buying the two products.