Multi-Surface Scanner Kit Accuracy 3/16 in Overall Height 4 3/16 in Batteries Required Batteries Required (Included) Overall Width 12 in Overall Depth 4 5/8 in Materials Detected Live Wire Ferrous Metal Non-Ferrous Metal Plastic Wood Battery Type Li-Ion Scan Depth for Ferrous Metal - Maximum 7 3/16 in Scan Depth for Wood - Maximum 7 in Compatible Surface Material Dry Concrete Drywall Hollow Block Wet Concrete Wood Scan Depth for Live Wire - Maximum 4 3/4 in