This adapter cable is exactly what I needed for recording audio using an external microphone while recording video with my iPhone. The separate headphone output works flawlessly as well.I was pleasantly surprised with the high-quality manufacturing. The inputs are tight and the look and feel of this item is first class.I've read a few other reviews on this prior to purchasing and it seems that anyone who had issues with this must've simply not fully understood what they were buying. I've been involved in audio and video production for many years and needed a simple way to separate the audio input from the audio output for use with a smartphone. In my case, I am using an iPhone. I imagine this would also work well with an android, but I haven't tested that.