For precise location of concealed fittings and other ferromagnetic metals (iron, steel and cast iron). No interference from aluminium, copper etc. Easy to recognise due to sound signal. Display of field strength and power cable warning symbol. The use of the ERASE button makes it possible to work near metal fences or other large metallic objects to obtain good locating results. Display of polarity with plus and minus signs. SMART+ mode for objects buried vertically to the ground surface (e.g. slider rods without cap): other magnetic objects are are hidden. Length: 109 cm Waterproof search stick and speaker Power supply: 6 x 1.5 V AA batteries Operating time: approx. 100 hours Operating temperature: -20°C to +60°C Weight: approx. 1.1 kg Scope of delivery: ST 102 with protective bag, batteries and operating instructions