Wide range of applications: The EM285 circuit tester can be used to test continuity, polarity of voltage, check lamps, electric motors, locate short circuits, and test for bad ground contacts. Long test lead: The cable length is approximately 16 feet, allowing easy testing of various electrical systems. Short-circuit protection: The unit includes short-circuit protection and can quickly identify faulty ground connections. Easy operation: After connecting the unit to the vehicle's battery, users can apply positive or negative battery current to the probe tip by toggling the power switch. Comprehensive 6-24V DC test kit: For use only with DC voltage systems. Do not use on AC voltage. Instructions: Unroll the cable, attach the red clip to the positive terminal of the battery, and connect the black clip to the negative terminal. Operating voltage: 6-24V DC. Overload protection: 8A (automatically disconnects when current exceeds 8A). Color: black and red. Material: plastic and metal. Package includes: 1 x Circuit Tester. Additional items not included. Note: Lighting and display differences may result in slight color variations between the image and the actual product. Measurement tolerance: +/- 1-3 cm.