Voltage sensitivity tester and circuit tester for quick voltage checks. Designed for professional mechanics and DIY enthusiasts alike, it helps identify live circuits and potential wiring faults with clear, drop-in testing. 12V circuit tester with cable. A versatile and practical tool for testing circuits, including automotive circuits in 12V systems. The wired design provides flexible reach and stable connections for accurate results. Easy to operate. Convenient handling and straightforward use for circuit tests in automotive and electrical applications. User friendly in both workshop and field environments. Vehicle tester for cars and other vehicles. An efficient and reliable tool to diagnose electrical problems in vehicles, serving as a cable tester and electrical tool in one. 2-3 use scenarios - Automotive troubleshooting: quickly verify battery terminals, fuses, relays, and wiring harnesses to locate electrical faults in cars and light trucks. - Aftermarket installation and repair: check power and ground connections when adding or repairing components such as lights, alarms, or audio systems. - On-site electrical verification: confirm presence of voltage in 12V circuits during repairs, installations, or service calls in vehicles and other 12V systems.