Zircon MultiScanner Pro SL Multifunction Wall Scanner with Easy-to-Read Display Screen Locates the edges of wood or metal studs up to 1-1/2-Inch (38 mm) deep Scans for metal and live AC wires Easy-to-read LCD screen indicates targets, while the patented SpotLite Pointing System shines a beam of light on the wall for easy targeting. Wire Warning detection indicates the presence of live, unshielded electrical wiring up to 2-Inch (51 mm) deep Have questions? Need more information? Call the Zircon Customer Service department at 1-800-245-9265, Monday-Friday 9am - 5pm PST. We'll be happy to help!