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 test: This cable tester offers high accuracy, ensuring safe and reliable testing of telephone and local area network cables, making it an essential tool for electricians. Easily identify the wire pair: Utilizes SmartTone technology to identify correct wires. When the remote end of the short-circuit cable is paired, the tone rhythm changes, allowing easy and accurate identification of wire connections. Intelligent function for accurate pairing: Use the SmartTone function of the Pro3000 analog audio generator to accurately identify and pair wires. This intelligent feature simplifies the cable fault detection process. Unique tone, easy to identify: With SmartTone technology, hear 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: The package includes only the items listed above; other products are not included. Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.