1. Wide range of applications: The EM285 circuit tester can be used for testing continuity, checking voltage polarity, inspecting lamps, examining electric motors, locating short circuits, and testing for poor ground contacts, among other functions. 2. Long test lead: The cable length is approximately 16ft, facilitating easy testing of various electrical systems. 3. Short-circuit protection: The unit is equipped with short-circuit protection and can instantly test for poor ground contacts. 4. Easy operation: After a simple setup by connecting the unit to the vehicle's battery, automotive technicians can apply positive or negative battery current to the tip by toggling the switch forward or backward. 5. Comprehensive 6-24V DC test kit: Not suitable for use with AC voltage. 6. Operation instructions: Unroll the unit's cable; connect the red clip to the positive terminal of the vehicle's battery; connect the black clip to the negative terminal of the vehicle's battery. 7. Operation voltage: 6-24V DC. 8. Overload protection: 8A (When the current exceeds 8A, the item will automatically disconnect the current). 9. Color: black + red. 10. Material: plastic + metal. 11. Package contents: 1 * Circuit Tester. Only the above package content is included; other products are not provided. 12. Note: Due to light and different display factors, the color of the item may slightly differ from the actual product. The allowed measurement error is +/- 1-3cm.