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 highly accurate results, enabling safe and dependable testing of telephone and local area network cables, making it an essential tool for electricians and professionals. Easily identify wire pairs: Utilizes SmartTone technology to detect correct wiring. When the remote end of a short-circuit cable is paired, the tone rhythm changes, allowing for easy and precise identification of wire connections. Intelligent pairing function: Use the SmartTone feature of the Pro3000 analog o generator to accurately identify and pair wires, simplifying the cable troubleshooting process. Distinct tones for easy identification: With SmartTone technology, hear five different tones through probes to quickly identify and match required wire pairs, saving time and effort during cable testing. Color: As shown. Material: Plastic. Package contents: 1 set x Circuit Finder. Only the items listed are included; other products are not included. Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement allows an error of +/- 1-3 cm.