Electronic Stud Finder, Accuracy 1/8 in (Stud Center), 3 in (Metal Mode Scan Depth), 3/16 in (Stud Edge), 6 in (AC Scan Mode), Overall Height 7 1/4 in, Batteries Required Batteries Required (Included), Overall Width 3 1/4 in, Overall Depth 1 7/16 in, Materials Detected Ferrous Metal, Non-Ferrous Metal, Battery Type 9V Alkaline, Scan Depth for Ferrous Metal - Maximum 3 in, Scan Depth for Wood - Maximum 1 1/2 in, Scan Depth for Live Wire - Maximum 2 in, Features Auto Recalibration. This item has been restricted from sale in the following state (s): []