Review on Enhance Your Listening Experience with KZ APTX-HD Bluetooth Headphones Extension Cable for KZ ZST ZS10 AS10 BA10 AS06 ES4 ZSR Earphone Accessories by Todd Look

They work well, are easy to use and offer good sound quality from the source when plugged in. Unfortunately, the noise level is too high to be acceptable. Noise floor is the static noise you hear when you turn your speakers up loud when nothing is being played through them. You can usually turn down the speaker volume and increase the input volume to compensate, but turning down the volume on the wired controls does nothing to reduce the noise level in this product. It's the same volume no matter what, and it's VERY noticeable. It drowns out when playing music, but you'll definitely hear it when playing music at a low volume. There are many small annoyances I can deal with when it comes to audio products and noise level is one of those things that seems insignificant. but it affects the sound quality, so it becomes a serious problem when working with audio products. And in contrast to the subjective sound quality, a high level of noise is noticeable to everyone, which is not always a good thing. Unfortunately I won't be using this with my AS10s and will continue to look for a B pin bluetooth cable to use with them.