Tone and probes have been around a very long time, since the 1970s. The Armada products are light years ahead of the old units. Finding and identifying wires has never been faster or easier than with high tech AC noise filtration, LED headlights, CATV adapters built-in, etc. With over 25 years of experience in the tone and probe field, we know what we are doing. Even the AA battery power is a unique and clever way to maximize the life of the units to over 250+ hours of use and provide an easy to replace the source of energy.