This is a Megger S1-1068 10kV insulation resistance tester designed for high-voltage testing.
It features a durable, hard-shell carrying case with a built-in safety warning diagram on the lid.
The device is designed for use in noisy substations with 8 mA noise immunity and adaptive filtering.
The control panel includes a red "TEST" button and a rotary dial to select test voltages up to 10 kV.