Item Type: Needle Detector_x000D_ Model: TY-20MJ_x000D_ Power Supply: 1x6F22 9V Battery (Battery Not Included)_x000D_ Material: ABS_x000D_ Purpose: It is suitable for metal detection._x000D_ Detection Method: Magnetic Field Induction_x000D_ Detection Method: Move Left and Right_x000D_ Sensitivity: It can detect 1.2mm diameter iron balls from a height of 10mm._x000D_ Highest Sensitivity: It can detect an iron ball with a diameter of 0.8mm/diameter 0.720 from a height of 50mm._x000D_ Detection Prompt: Sound Alarm_x000D_ Pin Sensing Range: Approx.20-50mm / 0.8-2in_x000D_ Paperclip Sensing Range: Approx.30-60mm / 1.2-2.4in_x000D_ Nail Sensing Range: Approx.20-100mm/ 0.8-3.9in 1Using the principle of magnetic field, it can effectively and accurately detect the specific location of ferromagnetic metal impurities such as broken needles, which is very suitable for the detection of thin and small items. 2With high accuracy, it can accurately find the exact position of the steel needle or ferromagnetic metal in a small area, avoiding metal impurities from causing damage to consumers and production enterprises, and improving the quality of enterprise products. 3For the inspection of broken iron needles, it can detect broken needles on thin and small products such as knitting, clothing, socks, quilts, leather, shoe materials, etc., to ensure safety when wearing. 4Detection of ferromagnetic materials, it can be used to inspect hardware buttons and other clothing accessories, as well as medicines, foods, and chemical materials. 5Inspection of internal conditions, it can inspect the nails, steel bars, and pipes in wood, wall, and tables, as well as work injuries, cuts, and crush injuries on humans, livestock, etc., to check whether the interior Infiltrate harmful iron filings.1. Don't forget to turn off the power after use._x000D_ 2. The battery should be removed if it is not used for a long time. 1 x Needle Detector (Battery Not Included) 1 x Test Card 1 x Manual