Handheld Security Guard

Specification Power 9V( 6F22) Operate Frequency 22KHz Operate Current < 50mA Operate Voltage 7V-9V Indicator Visual: Red / Green LED Sound: Speaker or Earphone; ( Earphone not included) Control On/ Off Switch; Low sensitivity Switch Sensitivity Adjuster High Sensitivity 15mm at Pin; 45mm at USD 25 Cent Low Sensitivity Detector only respond to bigger metal objects such as a hand gun, knife, etc.