Martindale-TEK600-Professional-Cable-Detector-Martindale-MARTEK600-P-The-Martindale-TEK600-is-a-reliable-cable-&-pipe-detector-capable-of-detection-through-a-variety-of-building-aggregates-&-sub-surfaces-With-both-a-visual-indication-&-audible-tone-cables-can-be-pinpointed-up-to-a-depth-of-25mm-with-a-high-degree-of-accuracy-P-P-Whereas-other-conventional-cable-detectors-can-be-affected-by-ferrous-&-non-ferrous-metal-frameworks-the-Martindale-TEK600-cable-detector-is-capable