The Triplett Fox & Hound HotWire is a live circuit tracing kit that consists of a versatile Fox HotWire Tone Generator (Toner) and a high performance Hound HotWire Inductive Amplifier (Probe). The Fox HotWire can powered by a 9 volt battery for Low Voltage tracing or it can be powered by the High Voltage line it is toning. The Fox HotWire 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 Hound HotWire 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. Founded in 1904, U.S.-based Triplett Test Equipment continues to be on the leading edge of specialized testers. Whether supplying vital test equipment to the U.S. Signal Corps during WWII, or providing the railroad industry with essential testers to ensure the safety of their crews and the public, Triplett prides itself in developing innovative, reliable, and durable test equipment for every technician--that also won't break the bank.