Feature: 1. LCD Display: This electronic stud detector utilizes an LCD display that will show you the direction and strength of the beeps when material is found, telling you if you are closer to the target. 2. Easy Calibration: This electronic wall scanner is very easy to calibrate, press the scan button to start calibration, the decreasing bar will disappear and the buzzer will beep once, calibration is complete. 3. Easy To Use: This smart stud sensor is simple to use, keep the tool level with the wall and do not wiggle, tilt or press as it slowly glides across the scanned surface. Once the edge of the stud is picked up, the stud detector beeps. 4. Compact And Portable: This stud finder wall scanner is small in size and light in weight, which makes it very convenient to carry around and use. 5. Wide Application: This stud sensor beam finder has a wide range of applications and can detect metal, wooden beams and energized cables concealed in walls, ceilings and floors. Specification: Item Type: Stud Finder Wall Scanner Material: ABS Battery Type: 9V 6F22 x 1 (Not Included) Detecting Wood Stud Center Gears: (I: 3/4 in. (19mm), II: 1 1/2 in. (38mm)) Detecting Metal Gear: 2.36 in. (60mm) Detecting Live AC Wires in Walls Gear: 2 in. (51mm). Package List: 1 x Stud Finder Wall Scanner 1 x Manual