HD Bluetooth Module Wireless Upgrade Cable

    Bluetooth 5.2 HIFI Wireless Ear Hook
    Strong compatibility
    Small and light Comfortable wearing experience
    AAC Advanced Audio Coding Transmission Technology
    Dual-host Dual Channel
    *Note: This product is only for Bluetooth upgrade earhook, without earphones
    C PIN for ZSX / ZSN / ZSNPRO / ZS10 PRO / AS12 / AS16 / ZSN PRO X / ZAX / ASX / DQ6 / ASF
    B PIN for ZST/ZS10/AS10/BA10/ED12/ZSR/ES3/ES4 /ZST X/EDX/ AS06
    Please do NOT use fast-charging adapters
Product Price
Terms & conditions
This Product is a Pre-order

Processing Time before shipping: 10-15 working days for C-pin. Units are delivered to us and shipped out in batches, sequentially. avg.

This is a rough estimation. It may change without prior notice.

Free standard shipping to most countries

Free express shipping on orders over $270*. Enjoy free tax and duty paid to most countries. Please refer to our shipping FAQ to see if you apply.

Covid-19 Shipping Delay Notice

Shipping may be delayed due to covid-19 depending on your country regulations.
Free Shipping

Authenthic Products

Linsoul Audio is the authorized distributor. All products are authentic and genuine.

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Worldwide Free Shipping

We are located in China but send our products worldwide for free. T&Cs apply.


1 Year Warranty

We provide 1 year warranty for the all products except the cables*.

Pluggable Bluetooth Ear Hook

The plug-in design with gold-plated pins makes the earphones become wireless earphones in seconds,getting rid of the shackles of cables. You can choose the hybrid technology/dynamic/balanced armature earphones,and discover more interesting upgrades.

Strong Compatibility Get Rid Of The Shackles

As long as the device with Bluetooth function can be connected, the compatibility is strong, whether it is lOS system or Android, it is cornpatible.never worry about the length of the earphone cable anymore. *This product is only for Bluetooth upgrade earhook, without earphones.

Small and Light Comfortable

The Bluetooth ear hook weighs only 4.5 g, which is Light and has no pressure. The ear hook is made of skin-friendly resin, which is soft and comfortable and fits the auricle. Long wear is also comfortabLe.

AAC Advanced Audio Coding Transmission Technology

Professional sound quality comes from the chip and the dual protection of AAC advanced coding ability . AAC advanced audio coding transmission technology is adopted to greatly improve the quality of listening and bring natural and clear sound.

Dual-host Dual Channel

Transmission technology ,faster response,eliminate conventional single host , dual transmission ,lower delay , two earhooks can be connected to different Bluetooth devices , and the earhooks can be used individually.This product is only for Bluetooth upgrade earhook , without earphones.

Bluetooth version
Bluetooth range
Ear hook battery capacity
Charging case battery capacity

Coming soon...


Coming soon...

Customer Reviews

Based on 9 reviews
Great Product!

Slightly rolled of highs compared to being wired but some might like this as it tames the KZ 'V' signature somewhat. Battery life is great, I routinely get 5+ hours and with the case, I can go a Week between charges. You don't know you are wearing them, they are so light. Connection wise, they never miss a beat until I'm in a busy city area that has a lot of 'point to point' Wi-Fi links present. They can get a little muddled when it comes to this but bear in mind that these are massively powerful, industrial grade radio signals that they're being blasted with, at the same frequency! I can forgive them for this odd blip. It only really happens in major train stations in London for me. The AZ09 come highly recommended from me. As an audio engineer of 30 Years, they definitely pass my acceptablility threshold :)

Poor connection/ battery

At first, they were exactly what I was looking for, I was able to take my IEMs and make them wireless. After a few weeks the right ear was really spotty, turning my head would make it cut out, and now the right ear doesn’t hold a charge very frustrated I’m just glad they weren’t more expensive.

Mia Vizjak


Kevin Nguyen
Good ease of use, lots of room for much needed improvements

Connection stability while using both buds could be better, frequently stutters stops playing in one of the buds.
The voice notification (when powering on\off, switching modes) is also not great, much prefer simple beeping sounds instead.
And I was also expecting better battery capacity from the case, given the size of it.

Beside those, they fits my need with decent audio quality as a cherry on top.

Joel Menary

Thanks guys everyone now thinks I'm wearing hearing aids. Battery life is amazing I use them literally all the time and they haven't died once and I usually charge the case every 3 days
really amazing connectivity aswell

Maurizio Barbiero
A must have

I use these daily with my KZ ZSX and have to say that this set simply blows any other TWS set in the same price range out of the water.
The best thing about their ergonomics is that thanks to the ear hook there's no need for me to constantly adjust the IEMs within my ears every 5 minutes, even when running.
I would have loved for them to also have some kind of volume control, but having physical buttons instead of the so popular touch sensitive nonsense is already a big plus (and I can always set the music volume from my pocket through my smartphone's physical buttons, so..).
All things considered, if you have and love your pair of KZ ZSX or ZSN (I have those too) this is the best accessory to carry and use them on a daily basis.
Granted, the sound quality suffers a little, but it's a Bluetooth module, what else is there to expect

Bluetooth upgrade to wired IEM

Very nice upgrade to my CCA 16 drives and the where shipped very fast, thanks Linsoul. 🙏🏻

Kz AZ09 yes or no

I received the package 1 side doesn't charge and the seller asked to ship it back for testing but shipping is more expensive than actually the product cause and I bought it I have bought other products

Hunter Harrison
Too good to be true.

I had high hopes for these considering they claim to use Bluetooth 2.1 and have relatively good battery life but for me that's where the positives end and the problems begin.
Packaging and product quality: The charging case and device itself seem well built and solid on the surface. They fit nicely on my ears without pinching and hold even with a lot of motion. If you're looking for something that fits easily into your pocket you may want to look elsewhere but given that these are adapters for larger in ear monitors and not just wireless ear buds then it's a nice case that will fit well into any bag / backpack.
Battery Life: These will charge several times from the case before you need to break out the USB cable and they last a respectable 6hr+ though I haven't needed them longer than that in a single session so far.
Interface: There is a single button on each ear. If I turn one on, connect it, THEN turn on the other it will usually connect and sync to the other just fine. If I only want to use one at a time that works well too. It's very clear that the woman who voiced the audio prompts did not know English though it was mostly understandable and all audio comes through at max volume which has to be adjusted using your phone or PC.
Audio Quality: I have been using these with my KZ ZS10 Pro in ear monitors. Wired my KZ ZS10 Pros are clear with punchy bass that isn't as intense as a set of rap / hip hop tuned headphones with clear highs and quieter though still clear mids. When I plug them into the KZ AZ09 BT adapters I notice a couple things. The noise floor is pretty bad during quiet parts of music or podcasts. There's a small electronic hiss that doesn't bother me when something is playing but that does get to me if I'm listening to quieter parts of a classical music piece.
Pitch Shifting / Warping: This part should get its own section. When I first connect these the sound speed / pitch shifts noticeably. When listening to a couple very familiar songs you can hear the happy up beat guitar warp to almost a minor note and then pop for a second and come back just fine. This happens several times and is more frequent just after you've connected. I handed them to my boyfriend and he noticed it on the sample songs I showed off that he'd never even listened to before.
Range / Connection: The range is not great. Now I have never tested any other true wireless Bluetooth ear buds but it is shorter than the range on any other Bluetooth device I own but even so it seems perfectly acceptable. I can listen to my PC in the living room while one room away in the Kitchen which is fine with me. The real problem is the stuttering and cut outs. It doesn't matter where I stand in relation to the source these will occasionally just decided they don't like being connected and pop in / out frequently. Sometimes it's perfectly fine and I have no issue but other days it just refuses to remain steady.
Conclusion: If you're not doing any accurate listening through these and just want easy wireless connection to your phone then it's fine I guess for the price. That said one day when the sound was warping and it kept cutting in and out I just got frustrated and plugged my IEMs back into the regular aux jack cable and never looked back. I would shop around for something else if possible or grab something like a Fiio BTR3K instead. You'll pay more but it will be SO much more reliable.

Our Shipping Process

If everything goes right our system will automatically generate your order and send you a confirmation email. If you don't receive the confirmation email please double-check that it wasn't automatically stored in your spam or promotions folder.

3 Working Days*

Most of the items you see are in stock and ready to be shipped after 3 working days. If you plan to order a custom (Design or Fit) product, a pre-order, or a made to order item processing times may change on item to item basis.

Standard Shipping
15 to 30 Days.

Standard shipping is offered free worldwide for orders under $269 USD (with some exceptions), but please consider that delivery times may vary considerably depending on your country, up to 90 Days.

Express Shipping
3-6 Working Days.

Most items over $270 include free express shipping (DHL or similar). If your order total is under $270 you can manually add Express Shipping at the checkout page for $15.00 - $35.00USD

World-Wide Shipping

Shipping FAQ

Which countries do you ship to?

We are generally able to ship to most countries via Express Shipping, and many countries via Standard Shipping. You may clarify this with our team to check whether Standard Shipping is available to your country.

We cannot ship to addresses that are "PO boxes or APO/FPO".

*Note: Generally, we can only do Selected Shipping to India and Russia. We can only do Express Shipping to Africa, Argentina, Hawaii, Kuwait, Mauritius, Montenegro and Sri Lanka, to name a few.
This may be subjected to changes due to unpredictable issues such as Covid, war, and etc.

How much does shipping cost?

We have two shipping methods - Standard Shipping and Express Shipping.

Standard Shipping is free for most countries, while Express Shipping is 15-35USD depending on your country. If your order is over 270USD, Express Shipping is free*. 

*This applies for most countries. However, large items such as headphones and desktop DAC/AMPs (e.g. HarmonicDyne G200, MUSICIAN MDP-2, and etc.) are excluded.

Shipping fees exclude import taxes or processing fees that may be applicable for your country. Linsoul is not responsible for such fees. Should you refuse to pay the tax/customs fees, shipping fees will still be deducted from the amount paid for the two-way freight charges. The cost of the freight charges may be more than the amount reflected on your order due to tax and other miscellaneous fees.

Some parcels claimed to be “returned to the seller” may be destroyed by the post office or customs officers when buyers refuse to accept their parcels or fail to pay for their taxes. No refund will be processed for such cases.

Standard Shipping via YunExpress is a tax-inclusive option for some countries. However, Linsoul will not be responsible for additional administrative or handling fees charged by your local courier company or customs. Please kindly check this with your local customs.

For certain remote areas, there may be additional charges via Express Shipping. We will contact you if there is a need to make additional payments. 
Please contact us before placing an order, should you have any queries regarding shipping.  

How long does it take to receive the order after it is placed?

For in-stock products, your order will be shipped within 3 working days. You may check with our staff regarding the in-stock status of any products. 

Customized items will take a longer time. Please contact our staff for more information.

On normal non-sale days, once your parcel has been shipped out:

  • For Standard Shipping, it takes about 2-4 weeks for items to be delivered after shipping out. For some countries, it might take up to 2-3 months, depending on your country, its customs and other factors.* The duration for transit is something beyond our control. Linsoul will not be making refunds for such cases. Please consider an upgrade to Express Shipping or keep the waiting time in mind.
  • For Express Shipping, it takes about 3-7 days for items to be delivered after shipping out.

*Note: Timings might be affected due to festive seasons or other unforeseen circumstances

What happens if the parcel has been shipped but not delivered?
  1. First, kindly contact your local courier using the local tracking number.
    If your parcel were to be in transit for at least 3 months, it may have been lost in transit.
    For orders below $50USD, you may either opt for a one-time reshipment of parcel OR a full refund of the amount paid in cash via PayPal/Credit/Debit card.
    For orders above $50USD, we will only process a 50% refund of your order paid in cash via PayPal/Credit/Debit card. Should there be any concern about Standard Shipping, you are encouraged to opt for DHL Express Shipping instead.
  2. Customers are to bear the consequences and fees incurred, if the parcel was undelivered due to any of the following situation:
    • Wrong address or phone number provided by recipient
    • Recipient was uncontactable when courier company contacted
    • Refusal to sign for the package by recipient
    • Lost or damaged parcel because recipient opted for “no-signature delivery”
    • Refusal to pay for the local tax/processing fee by recipient
    • Refusal to provide supporting documents for custom clearance by recipient
Who will pay for the import tax/custom fees

Customers have to bear any form of custom/import/processing fees that are applicable for your parcel.

Should you be unwilling to pay for the fees and reject the delivery of the parcel, you will still have to pay for the shipping cost. Linsoul will only refund the amount of your order after deducting the two-way shipping fees incurred.

How do I get help for my order?

Cancellation or/and modification of orders can only be done manually via our staff, provided that our Warehouse Team has not processed your order.
As our Support Team might not be available during non-working days and weekends, please place your order wisely.
Should you really need to cancel or/and modify your order after purchase, please contact us via our support email ( or website chat. We will help you with the changes if that could be done.

In general, upon receiving your parcel, please confirm the contents of the package and ensure that the package is in good condition before signing for it. All customers are strongly advised to take an unboxing video of their parcel and packaging when opening their parcels and products.

For faulty/missing items, please send an email to for after-sale services. The following details are required.
1) Send an email to with an appropriate Subject Title 
2) Provide your order number and state the issue clearly
3) Attach photos and videos to show that your product is faulty/missing. Shipping details on the parcel packaging have to be clearly visible.

If the photos/videos provided are insufficient to prove the stated issue, we will enquire more. Once the issue has been confirmed, we will arrange for a replacement, partial refund or a full refund (where applicable). For incorrect products, Linsoul reserves all rights in deciding whether you need to return the incorrect item or not. Please kindly contact us via email first. Our team aims to review your email within 3 working days.

For other queries, the fastest way to contact us is via our website or Discord

Linsoul Audio will not be responsible for parcels that have been damaged during the transit process.

Do I get tracking details for my order?

After placing an order, you will receive the order confirmation email. After your order has been shipped out, you will also receive a tracking email. You can track your order via the tracking number online. Should you not have received the emails or face any difficulties tracking your order, please kindly contact us for support.

For more than 1 orders placed under the same account and shipping address, Linsoul will automatically combine the orders and ship them out via one tracking number. Should you have special requests to have the orders shipped separately, please kindly contact us via Discord or our website's chat. We will do our best to help.

What shipping companies do you use?

We collaborate with these courier companies:
Standard Shipping: 4PX, UBI, NinjaVan, and Yun Express
Express Shipping: DHL Express, FedEx and SF Express

Last updated: 1 November 2022

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