Voltage display finetuning The voltage tester includes a voltage display finetuning function that lets you adjust measurement results for accurate readings, meeting professionallevel testing needs and reducing uncertainty. Internal resistance display finetuning The internal resistance display finetuning function enables precise adjustment for both small and large resistances, improving test accuracy and reliability across different resistance ranges. Adaptive visual experience The device provides a 9level backlight brightness adjustment. Whether in bright light or dim conditions, you can set the screen brightness to a comfortable level to protect eyesight and simplify operation. Performance and reliability Finetuning capabilities for voltage and resistance enhance measurement fidelity and test reliability in professional settings. Use scenarios Electrical panel maintenance and onsite diagnostics in environments with varying lighting conditions. Electronics lab bench testing and troubleshooting of circuits requiring precise voltage and resistance readings. Field service for industrial equipment, where adjustable backlighting improves visibility in outdoor or harsh lighting.