KZ AZ09 Bluetooth 5.2 Module Wireless Waterproof Ear Hook Extra Long Battery Life Bluetooth Cable for ​KZ ZST/ZSTX/ZS10/AS06/AS10/BA10/ZSR/ES4 (B pin)

Another great purchase to write about! I work around our property every weekend and being a music lover I always have ear buds in so I can listen to tunes while I work. The problem is apparently my ears are misshapen in some way that makes every ear bud I've tried not seat correctly so the buds fall out of my ear. Anyone who constantly has to readjust or push their earbuds in can feel me on that point.I wanted a quality ear bud that fit securely and wouldn't come loose as I worked - and this product didn't disappoint. I will say that being Chinese made, it has some funny quirks - it sounds like the lady announcing that the device has connected says "Connectate" instead of "Connected". I don't really care about that though - all I care is that the sound is good quality and the buds stay firmly in my ear. This product did both very well and I'm loving not having to take my buds out and reseat them every 5 mins. I'm using a after product foam type ear piece - you can squish it down tight, put it in your ear, and it will expand to fit perfectly.Battery life has been great for the time I've had these (about 6 months). I'll work around our 7 acre property for 6-7 hours without having to charge and it still has juice left if I forget to charge them.This also has an option to be used as a corded ear bud as well, which I did find useful since I travel a lot and use headphones with a plug while flying to watch movies or listen to music. Now I have the best of both worlds.From a cost/value perspective you can't beat the price and they do seem to be of good quality. I would recommend this to anyone looking for a versatile set of music buds, that stay put in your ear and block out unwanted noise, keep their charge for 7+ hours, and are easy to pair to your phone/tablet or computer.I'd definitely buy them again.

Es cierto que ya no necesitará el cable pero luego de experimentar el audio con él siento que no es igual y el sonido pierde algo de calidad en cuanto a sonido general pero en sí es un buen producto me funciona bien y me gusta 10 de 10.

These bluetooth adaptors work very well to turn in-ear monitors into amazing wireless earbuds. I had no issues pairing them to my MacBook. The battery life is really good, and the case only needs recharging every 10 days or so.Two small caveats that cost them a star for me: 1) one of the pair is a bit loose in the connection. Not super loose, but the monitor will unplug if you put too much pressure on the connection and 2) that same hook can be a little finicky seating down in the case to charge. That really only happened once, but partly because ever since it did I'm very careful to make sure it is well seated in the case.But combining these with a decent set of monitors will give you sound quality you'll never match with any regular earbud. Definitely worth the price.

These work perfect with the KZ ZST iems. They are light and comfortable and stay even with head shaking. Sounds just as great as plugging in with an audio jack. The case is on the large size, definitely have to throw the case in a bag unless you don’t mind bulging pockets. The case also fits with the iems attached. Very happy with this purchase.

I've purchased 6 KZ IEMs, the bluetooth cable for "paragraph b" connectors, and a dozen wired cables previously. I love the IEMs, but got tired of the cables wearing out quickly. So I upgraded to KZ IEMs with the newer "paragraph c" connector, and got this Bluetooth charging case.From the beginning, the right battery/earhook would only occasionally charge. I had a lot on my plate, and assumed I was doing something wrong, because it worked maybe 1/10 times.I just put the left battery and IEM in naturally, and it always works. I checked both sets of contacts for the right battery, and came to regularly try taking it out and placing it back in as the manual says, as we'll as wiggling the right battery and IEM around in it's compartment, and pressing the battery down in the compartment to make sure the contacts connected. That didn't change the fact it would only charge 1/10 times. I tried only charging the earhooks with the case also charging via USB-C, and only charging both battery/earhooks at the same time, even though the instructions don't say you have to, and even imply you can charge them seperately. Those didn't work either.Today I finally put them in at a time when I had nothing else to do, and experienced the same issue as always, and thought I'd leave a review. If this charging case has issues, don't try to troubleshoot them yourself. Just return them in the return window.I should also mention that the bluetooth does well through a room. But the manual states you should have your phone on the same side as your earhook, I am assuming when the connected device you are playing from is in your pocket. Obviously when you're wearing both earhooks your device can't be on both sides of your body at the same time. I have found silly things block the bluetooth for the earhooks compared even to very old bluetooth headphones. Sometimes I lay with my arm over an ear, and it cuts out. One time I was just sitting around and it was cutting out, and in that one occasion, even holding the phone right up to one earhook didn't allow for stable audio. Just test them thoroughly while you can still return them.