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 faulty ground connections. Long test lead: 16 ft cable length allows for easy testing of various electrical systems. Short-circuit protection: Built-in protection feature enables immediate detection of poor ground contacts. Easy operation: Simply connect the unit to the vehicle's battery; technicians can direct positive or negative battery current to the probe tip by toggling the power switch. Comprehensive 6-24V DC test kit: For use with DC voltage only; do not use on AC systems. Operating instructions: Unroll the cable, attach the red clamp to the positive terminal of the battery, and the black clamp 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 contents: 1 x Circuit Tester. Note: Other items not included. Color may vary slightly due to lighting and screen settings. Measurement error allowance: +/- 1-3 cm.