Metal wood stem center detector  It is used to detect the center position of the metal or wood stems in the wall. in addition, it can detect the metal and voltage functions in the wall, and whether the wires in the wall are live  [Higher efficiency] It can locate the edge of wood or metal rivets up to 11/2 inches (about 29.2 cm). (38 mm), the metal reinforcement is up to 2.36 inches. (60 mm) and the AC cord is 2 inches long. (51 mm).  [3 in 1 detection] Easy and accurate detection through automatic calibration, there are three modes to choose from: wooden column, metal object (rebar, stud and steel/copper pipe) and live wire.  [Intelligent design] Large LCD digital display, with lighting image and sound signal instructions. After about 1 minute of non-use, the tester automatically powers off to save battery.  Specification:  1) Quickly detect the center position of the stalk  2) LCD display, easy to read  3) It can detect wood and metal stems, and the wall thickness is within 1 1/2 inches (38 mm)  4) Metal pipes can be detected, and the wall thickness is within 2.36 inches (60 mm)  5) It can detect live wires in the wall, and the wall thickness is within 2 inches (51 mm)  6) All detection functions have automatic correction function  7) Operated by a 6F22 9V battery  8) Working power supply 9 (V)  9) Type is metal detector  colour:Yellow+black  Material:ABS    Package Contents:  1 x Metal detector  1 x 6F22 9V battery  Only the above package content, other products are not included.  Note: Light shooting 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.