Wide range applications: EM285 circuit tester can be used to test continuity, polarity of voltage, check lamps, electric motors, locate short circuits, and test for faulty ground contacts. Long test lead: Cable length is approximately 16 feet, allowing easy testing of various electrical systems. Short-circuit protection: Built-in protection feature enables instant detection of poor ground connections. Easy operation: Simply connect the unit to the vehicle's battery; technicians can direct battery current to the probe tip by toggling the power switch forward or backward. Comprehensive 6-24V DC test kit: For use with DC voltage only. Do not use on AC voltage. Operating instructions: Unroll the unit's cable Attach the red clamp to the positive terminal of the vehicle's battery Attach the black clamp to the negative terminal of the vehicle's battery Operating voltage: 6-24V DC Overload protection: 8A (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 accessories are not included. Note: Lighting and display settings may cause slight color variations between the product image and the actual item. Measurement may vary by +/- 1-3 cm.