Security inspection: airport, prison, customs, railway, stations etc. MD-S1 (HIGH PERFORMANCE HAND HELD METAL DETECTOR)FEATUREVery High SensitivityDetection of both Magnetic and ... Charger(4~5 hours, option) APPLICATION Security inspection: airport, prison, customs, railway, stations etc.Security defense: government, court, police, company, ... able to provide OEM for customers hand held metal detector