Enhanced durability: This cable tester is made of high-quality materials, designed for long-term use with excellent wear resistance, ensuring durability and reliability. Accurate and reliable testing: This cable tester provides high accuracy, enabling safe and dependable testing of telephone and local area network cables, making it a valuable tool for electricians and professionals. Easily identify wire pairs: Utilizes tone detection technology to identify correct wires. When the remote end of a short-circuit cable is paired, the tone changes rhythm, allowing for easy and accurate identification of wire connections. Intelligent pairing function: Use the tone generation feature of the Pro3000 analog audio generator to accurately identify and pair wires. This function helps simplify the cable troubleshooting process. Multiple tones for easy identification: With tone detection technology, hear 5 different tones through probes. Quickly identify and match specific wire pairs, saving time and effort during cable testing. Color: As shown Material: Plastic Package Contents: 1 set x Circuit Finder Only the above package content; other products are not included. Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.