The item shown in the image is a SEW Model 6211A IN, a microprocessor-controlled High Voltage Digital Insulation Tester capable of test voltages up to 10kV (1kV, 2.5kV, 5kV, and 10kV), housed in a heavy-duty yellow protective carrying case.Key Functions: Measures insulation resistance with auto-ranging capabilities, features a real-time bar-graph display for test voltage and discharge decay, and includes visual/audible warnings for live external voltages.Safety & Operation: Designed for use only on de-energized systems with built-in circuit protection, requiring specific lead connections for Line, Earth, and Guard terminals as labeled on the front panel.