Intellinet Net Toner and Probe Kits, tests datacom, telecom, security, video, and audio networks. Features a 2 position switch for single or multi-tone signal. LEDs for line polarity, continuity and voltage. Enhanced talk battery mode provides power for voice communications over inactive pairs. Testing leads and modular cables for individual wire tests or modular jack tests. Trace or identify wire or cables in a bundle or group. LimitedLifetime warranty "