Neewer&reg; RCA Male to Female Noise Filter Reducer Hum Killer Ground Loop Isolator Balun Low noise, no high frequency 50 hz ac ""om"" sound, ""Zi"" interference, high CD quality. Point-to-point balance transfer audio, can choose (RCA audio interface of isolator) 3.5 interface input and output 3.5 interface Excellent greater than 60 db - CMRR, high common-mode interference suppression ability Equipment, aerospace materials, with high sensitivity low illumination reduction features, the same kind of low-end products for 3 to 5 times higher sensitivity Plug and play, no need any operating system limitation, without losing a installation and debugging