3 In 1 Metal Detector Wood Metal Finder And Detection Of The Position Of The Live Circuit Concealed Stud Finder Wall Scanner Product selling point: 1. Using high-quality materials, the quality is guaranteed 2. It is suitable for use in interior decoration structure. It can detect the position of metal, wood and live circuit in the wall respectively. When metal, wood and live circuit are sensed, the instrument will display an analog bar and sound prompt. 3. This instrument is designed based on the principle that the change of the density of the material below the surface of the detected object causes the frequency of the detector to change. 4. Delicate and compact appearance, easy to carry 5. Wide range of application Parameter: Measuring range: Wood 30×30mm:18mm Metal detection depth: iron pipe 25mm, 30mm AC wire: 90 ~ 250V50mm Power supply: 6F22 type 9V battery Product size: 155x72x28mm Test Sampling: Place the instrument on the surface of the object to be measured, lightly pre the power switch beside it for 2 seconds to turn it on, pre the selection key in the middle to select the type of object to be measured, pre the power key to take a sample, and a beep sound will sound, indicating that the sampling is succeful Test operation: After the sampling is succeful, do not let go of the power switch and move along the surface to be tested. When the instrument senses foreign objects, the analog bars on the LCD screen begin to display in sequence. Next mark, release the power switch Place the instrument in the opposite direction of the surface to take samples, and approach the marked position. When the instrument senses foreign objects, the analog bars on the LCD screen begin to display in sequence. When the analog bars are all on and a "beep" sound is heard, use a pencil to make a drop. mark, release the power switch Repeat the test several times, if the alarm is raised, that is, there may be the object under test between the intermediate area When there is no corresponding test object below, it will not display or sound. For accurate test results, you can test several times. Package list: Metal detector*1 6F22 type 9V battery*1 Manual*1