Assembled type magnetic ring and name clip buckle type magnetic ring, it of absorption interference capacity is with its impedance characteristics to characterization of low band rendering very low of perceptual impedance value, not effect data line or signal line Shang useful signal of transmission. high frequency paragraph, about for 10MHz around began, impedance increases, its inductance components keep is small, resistance sex weight is quickly increased, will high band EMI interference energy to heat form absorption dissipation. usually with two a key points frequency 25MHz and 100MHz at resistance value to calibration EMI absorption magnetic ring/ Absorption characteristics of magnetic beads.