... frequency: 2.3kHz 4. Operating Current: 50mA Operating Voltage: 9V5. Power: 9V (6F22) standard or rechargeable ... desk-top charger. Applications This mini hand held metal detector is especially for treasure hunting, also applied in ... , Prisons, Nuclear Facilities, Correctional Facilities, Transportation Terminals, Public and Private Buildings, Loss Prevention, Schools, Corporate Security, Stadiums/ ...