Specification:Model: TH240Detectable type: Stud, Metal, WireDetectable depth of wall:Stud, within 38mm / 1.5inMetal, Within 76mm / 3.0inWire, within 76mm / 3.0inPower: 1* 9V 6F22 battery(No include)Weight: 180g / 6.3oz Feature: The LCD screen with backlight, clear, which is easy to read. All detection functions have automatic correction function. Easily detect the wire behind the wall without destroying it. Accurate detection and positioning makes your work easier and more efficient. Without tedious operation, it can be easily set up and put into use immediately.