DX Engineering Ferrite Low Frequency Large Snap-On Beads provide a high degree of RF choking and they can dramatically reduce RF noise. This Low Frequency Snap-On Bead can be used for special purpose applications on wires and cables. Effective RFI and noise suppression, from 150 kHz and up, is possible on wires and cables connected to routers, speakers, computers, PC power, control, keying and audio devices. With a sufficient number of these Snap-On Beads, pulse noise and RFI may be virtually eliminated. These medium size beads offer good surface area for a fair number of turns of smaller wire. Although some effort is involved with winding smaller wires around snap-bead cores before closing them, a much greater degree of RF noise suppression is achieved. Snap-On Beads provide excellent value for RF choking on many types of wires and cables with plugs.