Metal Wood Rod Center Detector with Metal and Voltage Detection Function It is used to detect the center position of metal or wood rods in the wall. It can also detect the functions of metal and voltage in the wall, whether the wires in the wall are live, etc. Specification: 1) Quickly detect the center position rod thickness 2) LCD display for easy reading 3) Detects wood and metal rods, wall thickness less than 1 1/2 inches (38 mm) 4) Detects metal pipes with wall thickness less than 3 inches (76 mm). 5) Can detect live wires in walls within 3 inches (76 mm) of wall thickness 6) All detection functions have automatic correction function Note: The data is manual measurement, please understand. please allow 1-3cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.