Enhanced durability: This cable tester is made of high-quality materials, designed for long-term use with resistance to wear, ensuring durability and reliability. Accurate and reliable test: This cable tester is highly accurate, 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 tone detection technology to identify correct wires. When the remote end of the cable is short-circuited, the tone changes rhythm, allowing for easy and accurate identification of wire connections. Intelligent function for accurate pairing: Use the tone generation function of the analog audio probe to accurately identify and pair wires. This feature helps simplify the process of locating and troubleshooting cables. Unique tone, easy to identify: With tone differentiation technology, you can hear up to 5 distinct tones through the 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 different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement allows an error of +/- 1-3 cm.