1. Wide range of applications: The EM285 circuit tester can be used to test continuity, test voltage polarity, check bulbs, check motors, find short - circuit faults, test poor grounding, etc. 2. Long test leads: The cable length is approximately 16 feet, allowing you to easily test any electrical system. 3. Short - circuit protection: This device is equipped with short - circuit protection and can immediately detect poor grounding conditions. 4. Easy to operate: After simply connecting the device to the vehicle battery, automotive technicians can conduct positive or negative battery current to the test probe by toggling the power switch back and forth. 5. Comprehensive 6 - 24V DC test kit: Do not use it under AC voltage. 6. Operating instructions: - Unroll the device's cable. - Clip the red clamp to the positive terminal of the vehicle battery. - Clip the black clamp to the negative terminal of the vehicle battery. 7. Operating voltage: 6 - 24V DC. 8. Overload protection: 8A (When the current exceeds 8A, the device will automatically cut off the current). 9. Color: Black + Red. 10. Material: Plastic + Metal. 11. Package contents: - 1 circuit tester. Only the above package contents are included, and other items are not included. 12. Precautions: Light and different displays may cause the color of the item to vary slightly from the actual product. The allowable measurement error is +/- 1 - 3 cm.