This cable is super. Tough build quality... it feels like it will last. I use it to attach my Rode VideoMicro microphone to my smart phone. The smart phone has the trrs jack, so this cable can directly covert the mic signal into something useable by my phone. Normal jack goes into the mic and the trrs jack (grey) goes into the phone. That is it! No other set up. So you can have great directional sound on your phone instead of the built in mic. Thanks Rode!