Features： 1、3?in?1, scanner stud detector for wood, metal, and AC wires. It can quickly locate and indicate the live AC wires, can detect the maximum depth of 0.71in (18 mm) studs, 1in(25mm) metal, 2in(50mm) live wires. 2、Easy to read, LCD digital display and continuous audible warning indicate you the position of the stud. 3、Easy to use, after the battery is installed, there will be a long beep when it is turned on. When it is automatically turned off, press the test button for 2 seconds to turn it on again. 4、Compact design, easy to carry and use, when the battery power is too low, the detector will send out a reminder. 5、There is an anti?scratch pad on the back of the detector to prevent the product from scratching and affecting the appearance. Specification： Item Type: Metal Detector Material: ABS Weight: Approx. 202g/7.1oz Product Size: Approx. 17.5 x 8 x 3cm/6.9 x 3.1 x 1.2in Battery: 3 x AAA 1.5V Battery (Battery Not Included) Stud Detection Depth: Wood: Approx. 30 x 30mm/1.2 x 1.2in Metal Detection Depth: Iron Pipe: Approx. 25mm/1in AC Live Wire Detection Depth: Approx. 50mm/2in (AC 90-250V Live Wire), Frequency 50-60Hz Working Temperature and Humidity: -7℃-40℃, <75% Storage Temperature and Humidity: -20℃-50℃, <85% Package List： 1 x Metal Detector (Battery Not Included) 1 x Instruction