Electronic Random Search Selectors (sometimes called Random Search Generators) offer a simple and reliable method of solving the age old problem of selecting "some members" of a "group" for searching or other form of special attention
...WITHOUT THE RISK OF THE SELECTORS BEING ACCUSED OF PREJUDICE
Ready for use straight out of the box with no complicated setup, there's a choice of Mains or battery operated units. Random Search Selectors are widely used in applications where metal detectors, etc, are used for scanning persons for knives or other illegal items, the routine searching of retail staff (as a deterrent to internal theft), and lots more.