This tone generator with amplifier probe identifies and traces wires or cables within a group without damaging the insulation. This tool is used in network installation and object inspection. The tone generator transmits a single signal or multiple frequency signals and has two single test cartridges and a four-core test cable. When using the tone generator with the wires tied and hidden in the wall or held together by a clamp, the signal transmitted by the main frame is very easy to test with the probe. The continuity of the wires, a fault in the wires, the polarity of the circuit, a network or the supply voltage of the modular cable can be tested with this group tester. The circuit flow and the detailed position can be checked by the indicator light and the tone from the speaker.