The Einhell TC-MD 50 Digital Detector is the ideal tool for DIY enthusiasts in the home, at the building site or for renovation work. It ;reliably locates metal, wood and electric leads. It detects ferrous metals such as steel and live wires to a depth of 50mm and non-ferrous metals such as copper to a depth of 38mm. Wood can also be detected to a depth of 19mm. It is simple and easy to operate due to its acoustic warning signal. Protector pads are also fitted on the back to protect the wall. The soft grip makes it comfortable to operate with just one hand. If set down to one side, it automatically switches off after one minute, without being used. Specification Detection Depth: Wood/Metal: 19mm, Ferrous Metal/Live Wires: 50mm, Non-Ferrous Metals/Copper: 38mm.Power: 1 x 9V 6F22 battery (not supplied).Weight: 0.34kg.