General purpose This multifunctional tester is suitable for a variety of testing needs in automotive repair and maintenance, providing versatile test functions for efficient diagnostics. Improved test efficiency The tester comes with a long test cable of approximately 4 metres, allowing easy access to the electrical system being tested without frequent moving or disassembly of parts. This enhances testing workflow and efficiency. Ensure safety Automatic problem detection and built-in short circuit protection help identify issues quickly while maintaining safety and ease of use during operation. Convenient use Quickly and accurately test the positive and negative power lines by connecting to the vehicle battery and moving the energy regulator forward or backward. The device is designed for simple, hassle-free operation. Key attributes Function: multifunctional automotive tester for electrical system diagnostics Compatibility: suitable for standard automotive electrical systems and vehicle batteries Cable length: approximately 4 metres for extended reach Safety: automatic fault detection with short circuit protection Operation: straightforward use by connecting to the battery and adjusting the energy regulator Use scenarios - Routine electrical system checks during scheduled maintenance to verify battery supply lines and wiring integrity. - Diagnostic work during repairs to quickly locate wiring faults and confirm circuit continuity. - Field or roadside testing to assess vehicle electrical system condition when access to the engine bay is limited. Notes This description preserves the original product scope and functions, including general purpose use, long cable reach, safety features, and straightforward operation for testing positive and negative power lines.