KZ ZST Bluetooth IEM 5.4 Module IEM Bluetooth Adaper Wireless 2pin 0.78MM for ​KZ ZSTX/AS10,Moondrop CHU II/Aria/Blessing

Absolutely awesome. No problem connecting, the design looks good and fits over the ears very well, sound quality of excellent. I think the "connected" voice is funny but it happens before you can even get them to your ear so you really have to TRY in order to hear it. Make sure you get the right model to fit your specific buds. I don't plan to go back to other headphones any time soon. Highly recommended.

I bought 2 of the kz az09 adapters, one for my castor pro’s and one for my zs10 pro’s. At $30.00 these bt adapters are perfect in my opinion. PROS: very good battery life, I use it regularly and charge the case once a week. Sound is really not much different than using a dac. Pretty low noise on these. The sound quality is AWESOME in my opinion. Good distance, probably about 30ft I’d say. Build quality is pretty solid. No issues as of yet. CONS: the only one I can think of is the case is a bit on the large size, and that’s it. Can’t really take away a star for that very minimal issue. 🤷🏼 All in all I highly recommend the the az09 adapters, they do what they are supposed to do, and do it well.

They sound awful. They have an incredibly high noise floor and there's an incredibly loud hiss while sound is playing. Also the minimum volume is too loud.

These were a good choice and a great value for the money. I got a nice Fosi IM4 which is open back and removes the sound pressure. Also has better sound the the airpods. Overall this was a nice choice. even though its using aac over bluetooth I get really great sound when paired with lossless from the music services. The earpieces are light but fit securely over the ear and are so comfortable you hardly even notice them. I literally wear them for hours at time. I get good range of at least the 15m advertised with no sound degradation. My only ding here is that they are loud and depending upon the IEM that you use and the buttons are really small. The case is ok it does top off the devices after you take them off but with a 400mh battery it does either one good charge or a couple short ones before the case itself requires charging. You have be cautious the with charging in general, its a dumb circuit, your best bet is to get an old usb type A charger and use it rather than a smart or fast charger. Using the later will ruin the battery in the case and the devices. While they are sweat resistant, i would not consider them water proof.

Not bad, not bad at all. Works well, fits well. Comfortable, all good so far.

The sound coming out of it was excellent. The only thing I didn’t like that the functionality was limited but for the price that what you get for . The other big problem. Is that the stuff working with my iPhone even though was working it just stopped working and I had more than one because I really enjoy how it fits around my ears, but all the ones that I have stopped working stop connecting to my iPhone device but to sound quality it was excellent, it was close to wired sound. The earbuds had connected to 16 driver KZ earbuds. I was also able to connect it to my Apple TV, and I absolutely love the sound, especially when I’m watching movies or listening to music.

Didn't have the best expectations for this kit but wow. They connected with the transmitter for my iPod classic no issues. My KSTs fit perfect and the sound is great. They feel better than the quality of my wires that came with the KSTs and feel like they are durable for Everyday use. Time will tell.

Calidad de sonido más que aceptable, pero creo que mejor hubiese comprado los de codex aptx

The sound quality is poor, plus I received it with no charging cable.

Amazing sound, especially for the price. Case is larger than current earbuds on the market but really I'm splitting hairs

Muy buen producto, no he tenido ningún problema de conección, ni de carga con los módulos. Recomendable!!!!

Excelente producto

La potencia es muy baja, no se aprovecha la capacidad de el auricular que conectas