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, ensuring safe and reliable 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 identify correct wires. When the remote end of a short-circuit cable is paired, the tone changes rhythm, allowing for easy and accurate wire identification. Intelligent pairing function: Use the SmartTone function with the Pro3000 analog signal generator to accurately identify and pair wires. This intelligent feature simplifies the cable fault detection process. Tone-based identification: With SmartTone technology, hear up to 5 different tones through probes. Easily 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. 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 may vary by +/- 1-3 cm.