3 in 1 : Multi-scanner stud finder for Wood, Metal, AC Current   Features:   Stud Sensor Scanner Depth: Detects stud up to 0.71 inches (18mm) , metal up to 1.2 inches (30mm), presence of live wire up to 3 inches (50mm) .   Quickly locates edges and center of wood ,wall studs, metal pipes,wooden joist ,rebar behind walls, floors and ceilings, also indicates the presence of live AC wire .   Easy to Read : LCD with digital display and continuous sound warning indicating you the location of the edges of the studs.   Easy to Use : After battery installation,the unit is turned on with a long beep,when auto power off,press TEST button for two seconds to turn on again.Auto power off without any operation .   Compact design is easy to hold and use. Low battery indication. Battery:AAA 1.5V*3（not included）.         Specifications:   Color: Blue,Red,Yellow,Green(optional)   Material: ABS   Battery Power: AAA 1.5V*3(not include)   Stud Detecting Depth: wood 30*30mm:≤18mm   Metal Detecting Depth: Iron Pipe 25mm:≤30mm   AC Live Wires：AC 90-520V live wire（5cm），frequency at 50-60Hz   Operating Temperature and humidity: -7℃-40℃,<75%   Storage Temperature and humidity: -20℃-50℃,<85%   Size: 155(L)*72(W)*28(H)mm   Weight: 200g         Packing List:   1×Stud Finder Sensor   1×User Manual