Feature:1. Mainly used for testing telephone and LAN cables, high accuracy, safe and reliable, suitable for electricians.2. Use for SmartTone function of the Pro3000 analog audio generator for accurate pairing recognition.3. The network cable tester is made of high‑quality materials, durable and wear‑resistant.4. When touching wires together and momentarily shorting far end of a cable pair, for SmartTone technology will change cadence of tone generated.5. Tone change you hear through the probe positively verifies correct wire pair. For SmartTone provides 5 distinct tones for exact pair identification.Specification:Item Type: Network Cable TesterMaterial: ABSTest Mode: Wire TrackingUsage: Network Cable TesterTest Area: Telephone and LAN CableCable Type: UnshieldedPower Supply: DC 9V Battery (Battery Not Included).Package List:1 x Tester (Battery Not Included)1 x Tester Clip1 x Manual