Equipped with a bright digital screen, double color LEDs, and three generic socket, this lightweight tester simplifies relays diagnostics through 10 cycle consistency check while withstanding workshop conditions via ABS housing Perfect for garage diagnostics, pre road trip inspections, or professional repair shops to verifing relays functionality and battery health across car, trucks, and motorcycles 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 efficient battery voltages ( 11-25v) for great vehicle 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 Ideal for mechanics, craft enthusiasts, and car owners needing quick electrical systems evaluations during maintenance check or roadside troubleshooting, Manufacturer: BULAIDAI