KZ AZ09 Bluetooth 5.2 IPV5 Waterproof Noise Reduction Bluetooth Module Upgrade Cable Ear Hook for ZST/ZSTX/ZS10/AS06/AS10/BA10/ZSR/ES4(B pin)

After ordering 2 different sets of IEM BT cable adapters from KZ (TRN BT3S and KZ HD gray cable) and I picked up the AZ09 against some of the reviews and was pleasantly surprised that 1) finally my callers could hear me properly. 2) it connected very fast like the KZ HD but I could use just one ear if I wanted and 3) the case is slick, magnetically grabbing them into position and charging them on the go. The led indicator is helpful and these finally let me wear my glasses much easier than the other two which I had to constantly trap the wire underneath the legs so they wouldn’t fall off. The BT3S were not bad mic wise but its not BT5.2 and connection was so so. Cutting in and out with a snapping audio cut everytime was irritating and replacing iphone clicking sounds with these annoying loud beeps sucked. Latency was terrible as well, had to re-pair them quite a few times to get them to sync up again. The KZ HD set was a good one and I hesitated returning them but the one main flaw was the length and arrangement of the wire. If they update the BT3S with the guts of the KZHD and shorten the cables a bit they would have a winner. Alas whenever I would take off the left one it would drag the mic and buttons to the back of my neck and that SUCKED. As a listening set it sounded great. I might say maybe better than the AZ09 by a bit. Louder and cleaner. By 5-10% Overall I am very satisfied with these AZ09. Sounds close to wired sound and I have them paired with KZ ZAX Metals in black which sound fantastic on them. Little bit of noise floor but tolerable for a day to day device. But they win all around. Definitely recommend them.

I'm just trying this out now, straight from the packaging. It comes fully charged. I used a pair of cheap ZST in ears I got also off Amazon a few years ago to test them. Pairing and setup was as easy as it could possibly be! So the Bluetooth tech is good tech inside! The voice samples that tell you the device is on/paired/etc are REALLY poorly recorded, which gives you the impression that the audio quality won't be good. But that is not the case. But the actual audio quality is quite close to a cabled connection, the signal has enough drive to push out bass frequencies on the ZSTs I used. Frequency response seems to be pretty flat and true, with maybe a hump around the 1-1.5khz range but that might be the ZSTs. Triple tapping the earpiece will put the drivers into high performance mode which gives a small boost in volume. I'm going to use these in the gym today and I'll edit this review to provide the battery percentage. But so far, this is an incredible buy!!!

I bought KZ ZS10 Pro's a while back, and have been loving them since, and decided to go ahead and try this bluetooth set for them. I figured at the price point, even if it didn't work right or was just unpleasant to use, I wouldn't even be that upset. That said, I absolutely love them, instead of meeting expectations, they blew them away, and I've been super happy with them in almost every way. Also sorry this is so long.... Small side note, the cons list is *not* longer, it's just more specific because I kind of had to nitpick a little bit, I genuinely don't have much bad to say about these personally, the star rating should speak for itself. TL;DR - If you want these for your pair of KZ IEMs, just get them. Do it. Pros - Sound quality - Obviously when paired with a set of IEMs that sounds good, I didn't notice any real quality degradation. My ZS10's sound just like I expect, and that's exactly what I wanted - Comfort - I wear these for 10 hour shifts at work, one ear at a time, swapping at lunch, and they haven't been uncomfortable yet - Battery Life - They will last well past 6 hours of continuous use, when I make my swap at lunch, I've been at around 40% life, and that's 5.75 hours into my shift - Connectivity - As of yet, I've not seen them even hesitate to connect to my phone, I open the case and I hear the little voice say "Connected", seamless and super fast - Build quality - While the case will be mentioned later, the bluetooth bits themselves are awesome, they're solid, the buttons are well placed, and I'm not nervous at all that they're going to fall apart or break on me - The Case's Function - The case genuinely belongs in both the pros and cons, it's here in the pros because it does have a USB C charger (that it comes with, a cable at least), it has never had an issue with actually holding the modules to charge, and it has a foam bit in it to hold the IEMs in their well safely. It's well thought out, and I think it does its job great - Buttons - There's physical buttons. You can't press them accidentally, you won't double tap if you didn't mean to, they *can* be pressed with just one finger, they're leaps and bounds above dealing with touch sensors. Yes it's technically a "moving part to break" but they seem robust and they're pleasantly tactile - Value - While these obviously aren't capable of producing sound by themselves, even including the price of these in conjunction with the ZS10 Pro's, I spent around $75, which puts them at about half the price of the (original) Galaxy Buds I'd been using, and I like them so much more in terms of comfort, sound quality, and the fact that there's no touch sensors - Call Quality - They are described to me as "7/10" and "about what should be expected from a good quality pair of true wireless earbuds", and I consider that beyond good enough for the price Cons - The Case's Build Quality - To be fair, I don't think it's *that* bad, and it seems sturdy enough, but the hinge is a little flimsy when open. It also is a little chunky, but considering the size of the modules+IEMs, that's not surprising(and not that bad) - Button function - While I like that there's no companion app, it's a little unfortunate that you can't change what the buttons do - For example, I'd like a double click on *either* side to do "Next Song", but double clicking the left side's button does "Previous" instead, which I almost never want. (This is a minor complaint for me though, I do have a smartwatch that I can use to control media anyway) - Where the IEMs connect - Again, this isn't a huge issue, but I did cut away a tiiiiny bit of the plastic around the connector that connects to the IEM, it doesn't quite fit around the IEM's connector, and feels like it should push all the way in, but there's like another 0.5-1mm of length on the contacts. It felt fine how it was, and I'm sure it would have been, it was holding just fine before I modified them, but I feel cutting away a tiny bit of that plastic surround made a bit of a better connection - If you have a smaller ear, or the original cable that comes with specifically the ZS10 Pro's(potentially others, I've only ever had these ZS10's ) doesn't fit you well, these bluetooth bits may not be the best fit. They fit me *perfectly*, but the original ZS10 cable does as well, so that may be something to consider if you know your ears are smaller than average - ANC/Ambient Modes - I don't think there's any ANC or Ambient modes, or if there are I haven't figured out how to get them active. This is *not* a con to me, those aren't features I want, but I figured it's worth a mention

I took the plunge even though I’m normally reticent of ordering straight from China, alas, Amazon only left me with that option. It took about three weeks for them to arrive and they are as advertised (except the buttons are different looking than on the website, but I think they blend in better so I don’t care. I’m using KZ ZS10 Pros with them, and the connector is the same C-Type so they hold firmly. They definitely aren’t as loud as using the APEKX Clip Bluetooth receiver I’m accustomed to with the factory cable, but they’re about as strong as using the Apple lighting dongle to connect to my iPhone. They seem to have no problem remembering three devices (Apple TV, iPhone and iPad), but they automatically reconnect to the previous one so you have to manually select them on a new device (and sometimes disconnect them from a previous device). The case is about double the size of the AirPods Pro case and twice as thick, but does charge them from about 20% to full in 30-45min. They have a “high-performance/low-latency mode” selectable which I assume must be for gaming. In standard mode I have no issues with audio sync to watch movies. The range is about normal for Bluetooth, 10m (30ft) ish, and if they do disconnect they reaquire the last device once you’re back in range. Putting them in or removing them from the case powers them off and on after the first pairing. It’s also important to note the left side is the master so you have to pair it in order for the right to then catch up. If you pair the right side first you’ll never get the left to pair. Once they’re paired, however, you can use them one side at a time if you wish. I’ve only placed a couple of calls with them from my apartment but neither party seemed to have any trouble hearing me and I didn’t mention I was using new wireless tech. The battery lasts over 4.5 hours of continuous use (they advertise 6-8 and I can believe it) and I haven’t managed to need to charge the case again after three days with it.

I've been pretty stubborn when it comes to trying out wireless headphones and earbuds, constantly preferring to buy phones with headphone jacks and always sticking with wired because I really never saw the cable as that inconvenient. And I've pretty steadily using KZ ZSN Pro's for the past year and a half, being some of the best value I've gotten from headphones to date. So when I discovered that there was an official bluetooth accessory for it at a reasonable price, I had to try them out. Well I'll start with the good: The packaging and build quality - As with the ZSN Pros, the packaging and overall build is phenomenal for the price you pay. I've had worse presentation from earbuds costing 4x as much as these things, and just the general feel of the actual case in the hand is nice. It's obviously a bit bulky, but it'd be a bit much to ask for Airpod like footprint from something this cheap. The magnetic hinge is a bit slippery for my tastes but works perfectly fine. Also glad to see Type-C charging and an included cable (albeit a comically short one but points for including one at all). The look - I absolutely love how these things look. Integrating the original braided cable design from the ZSN Pros with the small bluetooth receivers. I appreciate them not going with the usual long flat cable design that so many cheaper wireless earbuds do and making them look even more expensive. The case itself also looks as premium as something far more expensive (even if it doesn't feel quite as nice as it looks). Sound quality - This shouldn't be much surprise if you're familiar with the original IEMs, but they sound just as great when they work (not to bury the lede here). They sound maybe just a *tad* worse than if you use them wired, but it's such a minute difference I wouldn't notice if I wasn't looking for it. I've seen some people complain about increased static (something the original ZSN's struggled with), and it was maybe also a *tad* louder but if you're used to it on the wired version you'll be fine. And honestly, I didn't notice a difference really between the high performance and normal modes, although that might be down to my limited testing and not trying any lossless audio with them. The average to bad but inconsequential: Initial setup - I found it a bit clunky at first, because only one would pair at first (seemingly because there was supposed to be tape over the contacts keeping them from connecting without removal but one wasn't even int he correct spot) and it's not exactly intuitive if you haven't checked the manual beforehand, but it could definitely be worse. And chances are you won't be doing this much either way so whatever. The built in voice - There's a voice that comes on and tells you when a function has been done such as "disconnected" or "pairing". Normally this would hardly be worth talking about, but the AZ09's is so atrocious I can't help but mention it. It's rather inconsequential which is why I put it here, but they're using a text to speech thing very clearly not meant for English, as it manages to pronounce "disconnected" like "dis-cone-neck-tate" with a very odd accent. It's still usable, but it was an odd choice to not just use a voice designed for the language of whatever market they're releasing it in. And the bad: Staying connected - If there's one thing I can hope bluetooth headphones don't screw up, it's managing to stay connected to my phone while I'm listening to music. You know, the basic thing they're designed to do. But these don't manage to do that. For context, I decided to take these working out one day to test them out. My phone is no more than a foot or a foot and ahalf from my ears most of the time, sitting on a machine. I don't even end up moving my head much while using them period. But over the course of about and hour and a half, these were near unusable. I could not listen to a single piece of music without the left and right ears dropping out constantly, almost independently of each other. I switched to high performance mode hoping this would fix it, but found no respite from the godawful experience of using them. I kept hoping they would get better, but nothing changed over the course of my workout. In fact, I could swear they got even more flaky as time went on. They were at 100% battery as well, so I have zero reason to believe this was tied into my dropouts. I later tried them at home, literally sitting completely still at my desk and found the same exact experience as before. Overall, I just cannot recommend these when they can't even do something as simple as stay connected and transmit audio for more than 5 seconds without dropping out. I expected better from KZ, I really did, and I hope they can manage to release a new iteration that fixed this issue. But for now, I refunded my order and I'm sticking with my wired ZSN Pro's for the foreseeable future.

I had seen the mediocre reviews and I was hoping that I would have a different experience. It is really easy to set up and is built well. The Bluetooth allows me to get anywhere in the house without my phone and it stays connected. All this is ruined by the fact that this attachment creates a constant static noise that I couldn't get rid of. I could still hear the noise if the music was quiet. The battery life is also very poor in cold weather and could only an hour on a full charge. Overall, I wouldn't recommend you buy this. It's really close to being a great product but I would just stick with buying new wires.

Very happy with these earbud adapters. They have awesome battery life and the sound quality seems to be equal to when I use my earbuds as a wired headset. I have now switched to using my ear buds with this adapter exclusively. I use these whenever I am not at home and I want to listen to music or an audiobook. Extremely happy with this purchase. The price is very reasonable and the performance has no problems. Only one minor silly criticism. It has some verbal cues when you connect, turn on, or turn off the earbuds, and they have terrible pronunciation from the narrator

Honestly if it wasn’t for the sound issues I would give this 5 stars. When I first got it I absolutely love this product! It’s great to have a set of headphones that I can both use wired and wirelessly. And the sound is amazing for a pair of $20 headphones! But less than a year later and I’m having issues with the headphones constantly getting disconnecting and reconnecting like they are too far away and my phone is in my pocket. The sound cuts in and out. It’s annoying and renders them useless.

Não tenho fotos porém desde a compra usei para caminhar e pra pedalar de bicicleta. O fone fico bem confortável no ouvido e o som é muito bom, isolou bastante os barulhos de fora e durava várias horas sem parar; raramente havia picotes de som por causa do telefone no bolso, eu acredito. Mas com certeza melhor fone bluetooth que tive.

El punto mas fuerte de los az09 es la comodidad al eliminar el largo cable cafe y enrredozo. La calidad del sonido es buena, almenos yo no pude notar que el sonido empeorará. Otro punto que me parece muy atractivo es el poder intercambiar el auricular por unos de mejor gama de esta misma marca. Como punto negativo es que en ocasiones si al cubrir con la mano el dispositivo este pierde la conexión O al hacer ciertos movimientos, pero igual, por el precio que pagué no me molesta (480$ mx). Ademas Otro punto negativo esque si no cuentas con un auricular kz tendras que invertir un poco mas para utilizar el adaptador ya que el paquete no los incluye ademas EXISTEN DOS TIPOS DE CONEXIÓN PARA AURICULAR asi que ten muy encuenta esto e investiga cual es tu tipo antes de hacer la compra. En conclusión son un exelente upgrade para tus audiculares kz alambricos.

Als erstes die kleinen Schutz-Aufkleber entfernen, Case aufladen, IEMs draufstecken fertig... Das AZ-09 Bluetooth Gerät wurde sofort erkannt. Die Bügel sind federleicht und angenehm zu tragen. Bis jetzt hatte ich keine Verbindungsabbrüche, auch konnte ich kein Rauschen feststellen, auch nicht bei geringer Lautstärke. Die Bluetooth Verbindung ist auf jedem Fall bis ca. 10 m Entfernung -und zum teil geschlossene Türen- Stabil. Das AZ-09 ist zwar mittlerweile ein Auslaufmodell, dennoch ist die BT Verbindung stabiler als beim Nachfolger AZ-10. Nach ca. 4 Stunden Musik -bei normaler Lautstärke und ohne die Bedientasten zu betätigen- mussten die Bügel dann aufgeladen werden. Die Sound Qualität beim Kopfhörer ist meiner Meinung nach genauso so gut wie Kabelgebunden. Auch mit etwas größeren Memoryschaum Ohrpolster passen die Kopfhörer problemlos im Case. Die -Druck- Taste an jedem Bügel ist mir persönlich ein wenig zu klein geraten, und die Lautstärke lässt sich damit nicht bedienen. Alles in allem eine super Ergänzung zu den K-Z IEM's zu einem fairen Preis.

El producto está bien hecho, no se siente de mala calidad, estoy satisfecho con este producto pero hay algo que no me gustó nada, y es el piso de ruido que tiene, muy alto para mi gusto.

Die Reichweite reicht kaum von der Hosentasche zum Ohr. Schade eigentlich, denn die Soundqualität ist definitiv gut (besser als Beats z.b.) Ständiges Haken der Verbindung wenn man den Kopf bewegt.