The Fox & Hound HotWire is a live circuit tracing kit that consists of a versatile HotWire Fox Tone Generator (Toner) and a high performance HotWire Hound Inductive Amplifier (Probe). The HotWire Fox can powered by a 8 volt battery for Low Voltage tracing or it can be powered by the High Voltage line it is toning. The HotWire Fox can generate multiple tones (Pulse or Warble), provides a visual and audible continuity test, and integrates our own True Trace and TripLatch tests while providing overload protection up to 250 VAC. The HotWire Hound is a battery operated handheld lightweight Probe, with a thumbwheel Sensitivity control and Signal Strength indicator LED. It has a built-in LED headlights to illuminate dark areas and reduce fluorescent light noise, a bandpass filter to suppress unwanted frequencies, an earphone jack for noisy or quiet work areas, and an easy access battery cover.