1. 12V/24V universal design, compatible with 4PIN / 5PIN standard automotive relays for most vehicles. 2. Simple 3-step operation, one-touch test button with indicator light for clear pass/fail results. 3. Impact-resistant ABS housing, thick insulated alligator clips and extended cables for field repair. 4. Offline non-destructive testing by simulating vehicle power, accurately detects aging contacts & coil faults. 5. Widely used in auto shops, roadside assistance and apprentice training, supports batch relay inspection.
