Multi-function: High sensitivity, one-key adjustment function, simultaneous sound and light alarm function, long-term continuous operations without heating or overload Magnetic induction: The handheld portable needle detector uses the principle of magnetic induction to effectively and accurately detect the specific iron position of needles and other items. It has an adsorption function that can adsorb small metals to the machine, eliminating the need to manually search for metals. Scope of application: Suitable for thin items such as cloth, knitting, clothing, socks, quilts, leather, shoe materials, etc. It is very suitable for testing small items and accurately finding small ferromagnetic metal needles or precise positions. High performance: Using high-end imported digital chips, the performance is more stable and simple to operate, light weight, easy to carry, and the detector has high sensitivity Other uses: This detector can not only look for metal needles, but also check whether there are nails, steel bars, pipes, etc. in wood, walls, tables. It can inspect parts of the human body, livestock, etc. that have work-related injuries, cuts, bruises, etc. to check whether harmful iron filings have penetrated into them.