... scan speed4. Two type of alarm: audio & LED alarm5. Water proof probe:The sealed design of probe can be dipped ... frequency: 90 kHz Audio frequency: 2.3kHz 4. Operating Current: 50mA Operating Voltage: 9V5. Power: 9V (6F22) standard ... , Prisons, Nuclear Facilities, Correctional Facilities, Transportation Terminals, Public and Private Buildings, Loss Prevention, Schools, Corporate Security, Stadiums/ ...