Practical Portable Waterproof Metal Detector

$4.87

Product information: Product parameters: The detection distance of one dollar coin is3.5-4cm. Detection mode: vibration and sound alarm Power supply: 9V battery (not included in the factory) Working environment: temperature - 20- 60 Overall dimension: 22.9 * 3.8 * 2.2cm Single package size: 25.5 * 6 * 6cm Application: A. Safety inspection: security, courts, prisons, gymnasiums and other places where knives should be prevented. B. Factory anti-theft: chemical, mining, electronics, hardware, plastic products and other places need anti-theft. C. Education system: used for college entrance examination, high school entrance examination, civil service examination tools (mobile phone, electronic dictionary, MP3, MP4, U disk, etc.).