Features: The Car relays Tester features automatic pin detection and realtime LED indicators to instantly diagnose 4 pin/5 pin automotive relays with 95% accuracy, ensuring reliable battery voltages monitoring (11-25v) for great vehicle performances. Equipped with a bright digital screen, double color LEDs, and three universal socket, this lightweight tester simplifies relays diagnostics through 10 cycle consistency check while withstanding workshop conditions via ABS housing. Ideal for mechanic, DIY enthusiasts, and car owners needing quick electrical system evaluations during maintenance check or roadside troubleshooting. Perfect for garage diagnostics, pre road trip inspections, or professional repair shops to verifing relays functionality and battery health across car, trucks, and motorcycles. Its 16.5inch alligators clip secure attach to 12V batteries, enabling rapid testing of ≥20Ω coils relays with error release color coded result in under 2 minutes per unit. Specifications: Material: ABS Size:Approx. 14x5x2.7cm/5.51x1.96x1.06inches Applicable Pin: 5 Pin/4 Pin alligators Clip Opening Size: 2.1cm/0.82inch Battery Detection: 11v~25v voltages alligators Clip Line Length: 42cm/16.54inch Applicable Coils Resistance: Greater Than Or Equal To 20 Ohms Power Supply: Connect The Car Battery To Power Package Includes: 1pC Automotive relays Tester note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color.