4 in 1 Wall Tester Stud Finder Sensor Wall Scanner with LCD Display for Wood AC Wire Metal Studs Detection This handheld wall tester is designed to determine exact location of framing studs that are located behind the drywall. It will help you locate hiddened metal pipes, live wire, stud and metal frames accurately when you need to dig a hole to hanged a picture or install shelves.  Features: Smart Beep Function & Ergonomic Design - With an audible beep to remind you of the stud's location and position to find the stud center quickly. Handheld and anti-slip body for comfortable and firm grip, convenient e. LCD with Backlight Display and Low Batterys Indication, Large LCD digital display with green backlight and sound signal indication. 4 Detecting Modes - During the stud sensor mode, it can locate the the edges of wood or metal studs up to 0.75" (19mm), deep wood or metal studs up to 3/2" (38mm), metal rebar up to 2.36"(60mm) and AC wire up to 2"(51mm). Multi-scanner stud finder for Wood, Metal, Deep, AC Wire. Quickly locate edges and center of wood, wall studs, metal pipes, wooden joist, rebar behind walls, floors and ceilings, also indicates the presence of live AC wire. Advanced multi-sense sensor technology for accurate and quick locating studs wood metal & AC wires. Suitable for professional, homeowner or a DIY enthusiast. Specifications: Color: Black + Orange Material: ABS Display: LCD with Green Backlight Stud Mode: Detect studs with 3/4in, 3/2in, 2.36in and 2in mode  Maximum Detection Depth: Wood or Metal Stud Scan: 0.75" (19mm)  Deep Wood or Metal Stud Scan: 1.5" (38mm)  Metal Scan: 2.36" (60mm)  AC Live Wire Scan: 2" (51mm)  Automatic Shutdown Time: Power-off in about 3 minutes when no button action and no object scanned Indication: Low batterys indication & beeper indication Working Current: <50ma Standby Current: <1ua Operating Temperature: -20 ～ 50℃ Storage Temperature: -20 ～ 50℃ Power-Supply: 1 * 9V 6F22 Batterys (Not Included)  Item Size: Approx. 167 * 75 * 38mm / 6.6 * 3 * 1.5in  Item Weight: Approx. 148g / 5.2oz Package Size: Approx. 185 * 80 * 50mm / 7.3 * 3.1 * 2in Package Weight: Approx. 205g / 7.2oz Packing List: 1 * Wall Stud Finder 1 * English User Manual