The Fluke 1507 and 1503 insulation testers are compact, rugged, reliable and easy to use. With their multiple test voltages, they are ideal for many troubleshooting, commissioning, and preventative maintenance applications. Additional features on the tools save both time and money when performing tests. They offer great performance for an exceptional value. This remote test probe makes repetitive or hard-to-reach testing easier. Its live circuit detection prevents insulation test if voltage 30V is detected for added user protection. The test probe features auto-discharge of capacitive voltage for added user protection; AC/DC voltage: 0.1V to 600V; 200mA continuity; auto power off to save battery power; large, backlit display for easy readability; automatic calculation of Polarization Index and Dielectric Absorption