The INT077500 detects wood or metal studs, pipes and live wires. With its multi-depth stud- sensing feature (12mm, 25mm and 38mm) the unit indicates if a shallow fixing is possible. It has a backlit LCD screen, which is a great help if you are working in areas where the light level is low. Its unique feature is the laser pod, which can be used separately or together to create horizontal and vertical laser cross lines. The laser lines extend up to 6m, long enough for most internal walls. The sensor comes with eight adhesive dots for marking without having to bother with pencils. The heavy-duty ABS construction means it is more than tough enough for site use. Auto shut-off extends the battery life (requires 9V not supplied). Without doubt a very useful addition to the tool kit of lots of trades.