Bought the first kz bt module (b pin) a few months ago, because it was just around 5 bucks. Did not except it, but one of the strongest connectivity i met.
I use it with ES4 for biking or moving around in the apartment.
I liked the lucky bag aptx 2 pin cable sound better (more neutral, the kz elevates the treble a bit), but the cable broke just after a month of use (one side above the pin, quieter or no signal). Which is never happens to me, even with cheap jvc earphones. So now I am afraid to use my backup one.
I use it with ES4 for biking or moving around in the apartment.
I liked the lucky bag aptx 2 pin cable sound better (more neutral, the kz elevates the treble a bit), but the cable broke just after a month of use (one side above the pin, quieter or no signal). Which is never happens to me, even with cheap jvc earphones. So now I am afraid to use my backup one.