Detects steel, steel-reinforcement, iron and copper wires (hot and cold). Auto-switch off, integrated marker and optical acoustic signal. Simultaneous detection of wood/metal/wires. Specifications: Lateral resolution: +/- 5mm. Dimensions: 30 x 84 x 203mm. Detection Depth: 2-10cm depending on material detected. Supplied with 1 x 9V LR6 battery and soft pouch-style bag.