The ESI-550V Insulation Tester and Multimeter Combo is built for advanced diagnostic and safety checks. Rated for CAT III 1000V and compliant with IEC10101, it provides 250V, 500V, and 1000V test voltages for insulation testing. With a large dual display and built-in backlight, the ESI-550V makes it easy to read results in any condition. Ideal for automotive, industrial, and electrical maintenance applications.

Key Features:

• Insulation tester with selectable test voltages: 250V, 500V, 1000V
• Integrated multimeter test functions for versatile diagnostics
• Meets IEC10101 safety standards and rated CAT III 1000V
• Large dual display with white LED backlight for visibility
• Test Hold function simplifies solo operation
• Includes over-range and low battery indicators
• Complete with (6) AA batteries, test leads, and durable blow-mold case