Accurate Relay Testing: Quickly identifies faulty relays in automotive electrical systems using 12V power, helping you prevent breakdowns and diagnose circuit issues with greater precision and speed. Multifunctional Diagnostic Tool: Designed to test car relays, circuits, battery connections, and fuses, this tool streamlines automotive troubleshooting, reducing repair time and improving diagnostic accuracy. Compact and Portable Design: With dimensions of about 6.69x2.68x1.1 inches, this tester fits easily in toolboxes, glove compartments, or pockets, making it ideal for mobile repairs and roadside diagnostics. Plug-and-Play: No complicated setup required-simply connect to your 12V system and start testing relays, circuits, or battery performance instantly with clear visual indicators for user-friendly use. for DIYers & Pros: Whether you're a home or a professional technician, this relay tester is a reliable go-to tool for electrical troubleshooting in cars, trucks, motorcycles, and more. Color:Black Material:plastic Package Contents: 1 * Relay tester 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.