Hioki IR-4056 digital insulation resistance tester has 5-range testing, 50 to 1000V insulation tester, built-in rugged cases, lead storage compartments test, stable and medium-speed digital readings, 0.8 second response time, drop proof onto concrete from 1m, bright LED, luminous LCD, test lead with bright LED lamp to illuminate, continuity check via 200 mA testing and built in AC/ DC voltage meter.