Review on 🎧 KZ AZ09 Bluetooth 5.2 IPV5 Waterproof Noise Reduction Module Upgrade Cable Ear Hook for ZSX/ZSN/ZSNPRO/ZSNProX/ZS10PRO/AS12/AS16/ZAX/DQ6(C pin) - Enhanced SEO by Lloyd Edwards

Just received today and sounds very good for the price! Not noisy but more than adequate for my needs. If I want to take my music more seriously, I just use Hardwire. Didn't buy them to replace the hard wire. Just to use at work. The reason for the 4 stars is that it doesn't match the KZ ZSN Pro that well. It was too tight and didn't cover the entire base of the pin connector. I also have KZ DQ6 and have had better results. To get around this problem with ZSN Pro I created a standalone mod. I cut the plastic ring around the pins with wire cutters or nail clippers. I slowly cut it until I reach the base where the pins end and then I clean it up a bit. Get rid of plastic shavings. Now with the mod I can use another 2 pin IEMS! In the picture above I have connected FIIO FD1 to KZAZ09.