Fangrui Product Details :1. 5 Scaning Modes: The Digital Wall Scanner Has 5 Scanning Modes, Which Can Locate The Center And Edge Of Wood, Beams, Joists, Metal Or Deeply Buried Objects.2. Sensitive Sensor: Using Sensitive Smart Micro Sensor Chip, Can Quickly Find The Edges And Centers Of Metals, Studs, Joists, Pipes, And Live Ac Wires Behind Wall, Floors, And Ceilings.3. Lcd Display: The Stud Detector Has An Lcd Digital Display, Which Can Quickly Detect The Exact Position Of Studs And Other Objects.4. Easy Operation: Turn On The Electronic Stud Detector, And Then Place It Flat On The Wall, And Press The Scan Button To Calibrate.5. Wide Applications: Can Be Used For Different Wall, Such As Slats, Wallpaper Wood Floors, Sound Absorbing Ceilings, Painted Wall, Etc.specification:item Type: Stud Finderproduct Size: Approx. 152 X 70 X 38mm / 6 X 2.8 X 1.5inmaterial: Plasticweight: Approx. 170g / 6ozbattery: 1 X 9v Battery, Model: 6f22(battery Not Included)application: Quickly Locate Wood, Metal And Ac Wires Concealed In The Wall, Floors And Ceilings Of Houses. It Can Work On Slats, Wallpaper, Wooden Floors, Soundproof Ceilings, Spray Painted Wall And Other Places. Avoid Danger When Installing Tvs, Cabinets, Garage Racks, Etc.battery Power Indicator: When The Battery Power Is Low, The Low Battery Indicator Icon Will Be Displayed, Which Is Not Enough To Power The Tool For Normal Operation. Please The 9v Battery With A New Battery Immediately..package List:1 X Stud Detector(battery Not Included)1 X English User Manualnote:if The Wall Contains Lve Wires, Do Not Take Actions That May Be Dangerous. Before Penetrating The Surface, Be Sure To Turn Off The Power, Gas And Water Supply. Failure To Follow These Instructions May Result In Electric Shock, Fire, Or Serious Injury Or Property Damage. When Working Near Electric Wires, Be Sure To Turn Off The Power.