Wide range of applications: The EM285 circuit tester can be used to test continuity, polarity of voltage, check lamps, test electric motors, trace and locate short circuits, and test for faulty ground connections. Long test lead: The cable length is approximately 16 feet, allowing easy testing of various electrical systems. Short-circuit protection: The device includes short-circuit protection and enables quick detection of poor ground contacts. Easy operation: After connecting the unit to the vehicle's battery, an automotive technician can apply positive or negative battery current to the probe tip by toggling the power switch forward or backward. Comprehensive 6-24V DC test kit: For use only with 6-24V DC systems. Do not use on AC voltage. Operating instructions: - Unroll the unit's cable - Attach the red clip to the positive terminal of the vehicle's battery - Attach the black clip to the negative terminal of the vehicle's battery Operating voltage: 6-24V DC Overload protection: 8A (The unit automatically disconnects when current exceeds 8A) Color: Black and red Material: Plastic and metal Package contents: 1 x Circuit Tester Note: The package includes only the items listed above; other items are not included. Note: Lighting and display differences may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.