Triplett 8125 cobra cam pro inspection camera with detachable screen the fox & hound wire tracing kit consists of a versatile fox 2 tone generator (toner) and a high performance hound 3 inductive amplifier (probe).The fox 2 is a battery operated handheld multi-function toner that generates multiple tones (pulse or warble), performs some basic telephone line tests (loop ma, line polarity, and ringing voltage), provides a visual and audible continuity test, and integrates our own true trace and triplatch tests while providing overload protection up to 120 vac.The hound 3 is a battery operated handheld lightweight probe, with a thumbwheel sensitivity control and signal strength indicator led.It improves on previous designs with 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.Applications: trace various types of cable including, electrical wire, twisted pair, lan cable, mult-conductor cable, telephone cable, alarm cable and more! troubleshoot common wiring problems test phone lines for loop current, polarity, and ringing voltage perform continuity testing with visual and audible notification hound 3 adjustable sensitivity and loudness control bandpass filter suppresses 60hz and high frequency noise identifies fox 2's tracer tone up to 12 inches away headlights illuminate dark areas and reduce fluorescent light noise built-in signal strength indicator earphone jack for use in quiet or noisy environments shielded design suppresses inchfeedback noiseinch easy access battery door rugged, moisture resistant, mylar cone speaker fox 2 3 methods of connectivity: rj-11, rj-45, or alligator clips cordless phone interface high output, warble/pulse selectable tracer tone convenient magnetic back for easy mounting truetrace cadence shift for definite id of cable or pain within a cable red/green telephone line polarity leds tone/battery led- indicates that tracer tone is on and battery status overload protection to 120 vac