Standard electronic stud finders locate framing in applications that don't require sensing live wires. They signal with icons or flashing lights when studs are detected. Stud Finder Type: Electronic Stud Location Detected: Edge Materials Detected: Ferrous Metal; Non-Ferrous Metal Scan Depth for Ferrous Metal (Maximum): 3 in Scan Depth for Live Wire (Maximum): 2 in Scan Depth for Non-Ferrous Metal (Maximum): 1-1/2 in Scan Depth for Wood (Maximum): 1-1/2 in Overall Height: 6-1/16 in Overall Width: 2-11/16 in Overall Depth: 1-1/8 in Batteries Required: Batteries Required (Included) Battery Type: 9V Alkaline Accuracy: 1/8 in (Stud Edge); 3/16 in (Deep Scan); 6 in (AC Warning) Bluetooth: Not Bluetooth Compatible Features: AC Wire Warning Functions: Locates Studs and Joists Brand: ZIRCON Manufacturer Part Number: 61981 Batteries: 9V (Included)