"The Fluke 1503 Insulation Tester is compact, rugged, reliable, and easy to use. With its multiple test voltages, it is ideal for many troubleshooting, commissioning, and preventative maintenance applications. With a remote probe, repetitive or hard-to-reach testing is made easy. Test leads, probes and alligator clips are also included.Tester Type = Insulation Resistance TesterMinimum Test Voltage = 500VMaximum Test Voltage = 1000VMaximum Insulation Resistance Measurement = 2GOhmsDisplay Type = Graphic Display - BacklitTest Current = 200mAMinimum Operating Temperature = -20°CMaximum Operating Temperature = +55°CPower Source = BatterySafety Category Level = CAT III, CAT IV"