DTMVSTS78 Metal Voltage Stud 3 In 1 Detector Metal 25mm Stud 20mm Voltage 40mm- Using a precision screwdriver for easy unit sensitivity adjustment.- Metal Detector: 25mm max. penetration, detects screws, nails, gas, water pipes, etc.- Stud: 20mm max. penetration. - Voltage: 27mm detector; it detects the presence of live or dead wiring and traces its routing. - Type: Detector Cat III.\r\nThis is a 3-in-1 combined metal, AC voltage, and Stud Detector, with instant and audible warnings, low power-consuming light-emitting diodes, and buzzer indicators. It is powered by a 9V PP3 battery and comes supplied with a detector. It is a fast, accurate, and easy-to-use detector tool.\r\nFeatures:\r\n- Stud detection face.- Voltage detection face.- Depth penetration 18 - 20 mm- Red LED indicator.- Green LED indicator.- Sensitivity dial (stud detector).- Selector switch.- Sensitivity dial (AC voltage/ metal detector).- Green ON LED.- Red LED indicator.- Battery compartment.- Trimmer for stud detector.- Trimmer for voltage/metal detector.- Buzzer.- AC voltage detection adjuster.\r\nDimensions: (W)280mm x (D)51mm x (H)140mm.