I connected this module to my KZ ZSN PRO X. 1. The wires are quite soft, so it was difficult to bend it and install it behind my ears (comparing with the original wire where the part of the wires had the shape and they can be installed comfortable.) 2. The sound - When I tried to connect them to my laptop - there was a non-stop noise and the sound was awful. When I connected it to my smartphone the noise became lower (almost gone) so I could listen to the music and the sound was better, so - if you want to use this module with PC - forget about it. 3. Microphone - As I mentioned above - it's useless to use it with laptop, with the smartphone the situation is better, but the quality of the microphone is lower than average. 4. Connection. In general it works good but if you try to go farer than 3 meters - there are some gaps with the connection. So, be aware. But the seller is good and delivery is really fast.
Item as described, took 22 days to get to the US East Coast.