A clear audio signal indicates the position of a duct or cable when you pass directly over it. C.A.T. plus has a digital indication instrument to display the signal strength and depth measurement to the cable or to the transmitter probe. Three distinct detection methods can be used for easy location of 50 Hz-Radio- Genny. The receiver automatically switches off when not in use. Detachable speakers for use in noisy environments. Compact and lightweight, weighs less than 2.5 kg.