Can Be Used With Any Tone Generator Simplifies Wire And Cable Identification Progressive Electronics inductive amplifiers are recognized as industry standards by field service professionals. Used in conjunction with any tone generator, the units permit wire and cable identification without having to make direct metallic contact with the conductor. Powerful receiver gain permits accurate identification in even the most congested cable bundles and equipment rooms. Both models include a powerful, two inch speaker and a recessed, on/off push button control. The Model 200EP offers adjustable volume control for more precise identification when tone signal "bleed" is affecting the identification process. Additionally, the 200EP includes recessed tabs for buttset or headset connection that, when connected, bypass the probe's speaker. This is especially useful when working in noisy environments or at locations where the speaker noise may disturb customers.