Features: It detects and alerts immediately where a circuit is open. You-can quickly locate short circuits, open connections, broken wires. You can also find intermittent circuit problems by-flexing wires or connectors and listening-for a change in the receiver tone. Flexible probe-help reach wires in congested places-and hard-to-reach area. It is designed to identify and trace-wires or cables-without damaging the insulation. It also can be used in checking short circuit, locating open circuit, wire tracing, wire identification and more. Quick and easy: Judge continuity of the cables-or wires, and diagnose the break-point, making your repairs-quick. Specifications: Material:Plastic Size:As Picture Shown Functions: 1. Cable-tracking 2. Find the short-circuit cable 3. Check the cable disconnection point 4. Cable identification Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Automotive-Short and Open Finder (with battery) 1x Instruction Manual