The audio isolation former is made of permalloy material and is of high quality. High-end audio isolation cow, suitable for uses: balanced to unbalanced, balanced to balanced, mutual conversion interface isolation to current sound, to . Be used for Audio isolation, Audio balance conversion , Audio distribution, Audio noise reduction, purification, sound quality, etc...<br><br>Frequency response: 60Hz~2KHz REF 1KHz, 2db TURN RATIO: 1-3:4-6=1:1 HI-POT=1000VAC,1MA 2SEC(PRI-SEC) Impedance ratio600:600 Colour:silver gray Material:Permalloy<br><br>Package Contents: 1 x Audio Signal Isolation former<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.