Pro3000 Tone Generator and Probe Kit, SmartTone Technology, Handheld Telephone Line Circuit Finder 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 testing: This cable tester provides highly accurate results, enabling safe and reliable testing of telephone and local area network cables, making it an essential tool for electricians. Easily identify the wire pair: Utilize SmartTone technology to identify correct wires. When the remote end of a short-circuit cable is paired, the generated rhythm changes, allowing easy and accurate wire identification. 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 the probe. Easily identify and match the exact wire pairs needed, 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 slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.