Zircon MultiScanner 460 Edge Finding Stud Finder with Metal and Live AC Wire Detection, Backlit LCD Screen, and Ergonomic Grip Zircon's MS 460 is a multi-surface scanner with 4 modes that detect studs, metal and live AC wiring to help you easily find studs and avoid hazards while mounting a TV, hanging cabinets, installing garage shelving and more! Both StudScan and DeepScan modes locate the edges of wood or metal studs; Metal Scan mode finds both non-ferrous metal (such as copper pipe) and ferrous metal (such as rebar); AC Scan finds and traces live, unshielded electrical AC wires WireWarning Detection indicates the presence of live, unshielded electrical AC wiring while scanning in StudScan, DeepScan, and Metal Scan modes Backlit display screen and patented SpotLite Pointing System clearly indicate the target location and the ergonomic grip design allows for comfortable use regardless of hand size One fully charged 9V battery, not included, is required for the multi-surface scanner to run at optimal performance