Highly Sensitivity Metal Detector GP-3003B1 MCD- factoctor super scanner for security High sensitivity ,Distance of detectiong GP-3003B1Securitysuper scanner -----Handheld Metal Detector GP-3003B1ApplicationsElectronic detection inspection at airport ,railway station and wharfs,security inspection of customs ,public security,fronter defense ,and safeguard authoritues,quality inspection of ...