Quick relay diagnosis with clear pass/fail indicators Green LED indicates a good relay, red LED indicates a failed relay. The tester also records contact behavior and timing so you can verify relay switching and response without guesswork. Why this tester matters Saves time troubleshooting electrical problems by quickly confirming whether a relay is working. Prevents unnecessary part replacement and reduces diagnostic time in the garage or on the road. Key features and specifications Function: Tests standard automotive relays, displays pass/fail via LEDs, and provides contact and timing information for accurate assessment. Compatibility: Designed for automotive relays and relay kits commonly used in cars, trucks, and other light vehicles. Build and materials: Manufactured with precision from high-strength, durable raw materials. Odorless and safe to handle. Built to withstand frequent use and travel. Size and portability: Small, lightweight and travel-friendly for easy use at home, in a workshop, at school, or outdoors. Performance: Reliable operation that helps you confirm relay function quickly and repeatedly. Practical applications (examples) Home DIY: Verify replacement relays before installation to ensure you don’t fit a defective part. Professional garage: Speed up diagnostics during vehicle electrical troubleshooting and confirm relay timing for repair documentation. Field or travel diagnostics: Carry in a roadside tool kit for quick checks during breakdowns or on-site service calls. Why choose this relay tester Clear visual feedback and timing data simplify diagnosis and reduce uncertainty. Durable construction and precise manufacturing make it suitable for repeated use in professional and personal settings. Compact and easy to store or carry so testing can be done wherever you work. Gift idea A practical, useful present for car owners, hobbyists, students in automotive programs, and professional mechanics. Appropriate for Birthdays, Father’s Day, Halloween, or Christmas as a convenient relay tester car kit.