High-accuracy test tool for precise and safe circuit testing, featuring a 4MM port for a reliable connection. Color-coded design and durable ABS material provide long-term usability and straightforward operation in busy work environments. Designed for electronic engineers, repair technicians, and DIY enthusiasts, meeting both professional and hobbyist needs. Versatile for laboratory testing, electronic equipment repair, and home circuit diagnostics, offering broad applicability across tasks. Key attributes - Function: high accuracy testing with a secure 4MM connection - Compatibility: standard 4MM port - Size/Material: compact ABS construction for durability - Performance: reliable, easy to use, and safe for circuit work Use scenarios - In the laboratory to verify circuit integrity during prototyping and component testing - On-site repair of electronic devices for fault diagnosis and quick troubleshooting - Home projects and household circuit diagnostics to identify wiring or component issues