Tempo 711K Professional Tone and Probe Kit conains: 77GX Tone Generator, 200GX Inductive Amplifier, Rugged, woven polyester 700C Dual Carrying Case. Designed for the telecom professional, this kit is for use on single con-ductors, twisted pairs, coax cables and de-energized electrical wiring. The 77GX Tone Generator incorporates a host of features including microprocessor controlled circuitry for increased reliability, three selectable tone outputs for multiple line identification, two-line polarity indication for fast outlet checks and selectable power outputs for use on open or shorted pairs. The 200GX Inductive Amplifier features a simple, one-button operation and comfortable, ergonomic design. The adjustable volume control, LED visual signal strength indication, and powerful speaker make the 200GX ideal for noisy environments. Tempo 711K Professional Tone and Probe Kit contains the 77GX Tone Generator and 200GX Inductive Amplifier in a rugged carrying case.