FERRITE SLEEVE
Radiation from hands-free mobile phones can be reduced to virtually zero by a simple tiny magnetic bead. One of the most used yet least understood techniques for reducing both incoming and outgoing RF interference is the application of ferrite sleeves or beads to cables and at interfaces. A ferrite bead or sleeve is simply a hollow cylinder made of ferrite, which is a semi-magnetic substance made from iron oxide alloyed with other metals. It is most commonly used with computer cables, where it is slipped over the cable while the cable is being made, or snapped around the cable in two pieces after the cable is made. The beads can be clamped to the hands-free kit's wire and stops radiation from traveling up the wire and into the user's head.
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