Features: 1.Reliable and Convenient Wall Scanner: The stud detector uses an intelligent microprocessor chip with the highest sensitivity which can precisely and rapidly detect wood, pipes, metal and AC wires hidden in the walls, floors and ceilings.Whether you are a professional, homeowner or a DIY enthusiast, you will make your home projects easier. 2.5 in 1 Stud Finder Deep Detection:The digital wall scanner has 5 scanning modes, includes 1/2, 1 and 1-1/2 scanning mode to locate the center and edge of woods, beam, joist, metals or deeply embedded objects; Metal scanning mode to detect ferrous and non-ferrous metal up to a depth of 2.36 inches; AC scan detects unshielded 80 to 240 AC voltage lines up to 2 inches. 3.Automatic Calibration and Easy to Use:Turn on the stud finder, lay it flat on the wall, press the Scan Button and it is ready for calibration. When the wood, metal and AC wires hidden is found, the intelligent micro-sensor chip will flash and beep.Auto-calibrational the stud scanner makes easy to use and ensures that most objects behind the wall can be detected. 4.LCD Display and Audible Warnings:The stud finder scanner have LCD display and audible warnings.The signal bar on the LCD display alerts you to the distance and direction of the approaching object, and a beep sounds to determine the location.This LCD display is also backlit which can provide clear display even in low light conditions,such as displaying detection modes, center pointing, low battery indication and more 5.Wire Warning Indicator:Stud finder39;s AC wire Warming detects up to 2 deep, when you scan in Stud Scan/Deep Scan/Metal Scan mode, the Wire Warning is always on to alert you to the presence of live AC wires, which helps you avoid danger when mounting your TV, bathroom cabinet, photo frame, garage racks. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Description: material: plastic Product size:as the picture shown Battery model: 9v battery 6F22 not included Package List: 1*Stud Finder Sensor