Easy to find the stud center Accurately locates hidden metal pipes, live wire, stud and wooden frames Detects metal pipes up to 76mm/3 inch depth Detects voltage up to 76mm/3 inch depth Detects wood and metal stud up to 38mm/1.5 inch LCD screen with backlight Auto calibration for metal, voltage and stud detection Audio and visual indication (Beep sound reminding and easy-read LCD display) Item type: Stud Finder Sensor Wall Scanner Working Power Supply: 9V Battery: 1x 6F22 9V battery (NOT included) Application: Finding Wood Live AC Wire Metal studs in wall Colour:black Material:ABS Size: 15 x 7 x 3cm Package Contents: 1x Wall stud finder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.