Amprobe-AT-3500-Underground-wire-tracer-Amprobe-AT-3500-Keep-productivity-high-&-operational-costs-low-with-the-AT-3500-It-is-the-rugged-economical-solution-for-locating-underground-energized-&-de-energized-wires-cables-&-pipes-Great-for-parking-lot-&-airport-lighting-applications-it-precisely-pinpoints-buried-services-with-exceptionally-fast-sound-&-meter-response-The-backlight-multiple-segment-bar-graph-digital-display-plus-audible-indicators-show-&-tell-Amprobe-At-3500-