---
product_id: 630372554
title: "KZ AZ09 Bluetooth IEM 5.4 Module IEM Bluetooth Adaper Wireless B-pin 0.78MM for ​KZ ZST/ZSTX/ZS10/AS06/AS10/BA10/ZSR/ES4"
brand: "ez ear"
price: "€ 59.83"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ez Ear"
url: https://www.desertcart.fi/products/630372554-kz-az09-bluetooth-iem-5-4-module-iem-bluetooth-adaper
store_origin: FI
region: Finland
---

# B-pin 0.78mm compatibility Bluetooth 5.4 tech 42h total playtime KZ AZ09 Bluetooth IEM 5.4 Module IEM Bluetooth Adaper Wireless B-pin 0.78MM for ​KZ ZST/ZSTX/ZS10/AS06/AS10/BA10/ZSR/ES4

**Brand:** ez ear
**Price:** € 59.83
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your sound game—wireless freedom meets pro-grade precision!

## Quick Answers

- **What is this?** KZ AZ09 Bluetooth IEM 5.4 Module IEM Bluetooth Adaper Wireless B-pin 0.78MM for ​KZ ZST/ZSTX/ZS10/AS06/AS10/BA10/ZSR/ES4 by ez ear
- **How much does it cost?** € 59.83 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/630372554-kz-az09-bluetooth-iem-5-4-module-iem-bluetooth-adaper)

## Best For

- ez ear enthusiasts

## Why This Product

- Trusted ez ear brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **All-Day Audio Freedom:** Up to 6 hours per charge plus 7 full recharges from the compact 800mAh case—music marathon ready.
- • **Next-Gen Bluetooth 5.4:** Experience ultra-stable, low-latency wireless sound with AAC codec for crystal-clear audio.
- • **Seamless Multi-Device Sync:** Dual-host mode lets you switch devices effortlessly without missing a beat.
- • **Universal B-Pin Compatibility:** Designed for KZ ZST/ZSTX/ZS10 and more—upgrade your favorite IEMs instantly.
- • **Tailored Fit, Featherweight Feel:** At just 4.5g each, these earhooks deliver comfort and style with zero ear fatigue.

## Overview

The KZ AZ09 Bluetooth IEM 5.4 Module is a lightweight, wireless B-pin 0.78mm adapter compatible with multiple KZ IEM models. Featuring Bluetooth 5.4 with AAC support, it delivers stable, high-fidelity audio with dual-host connectivity and up to 42 hours of total playback via its rechargeable case. Perfect for professionals seeking seamless device switching and all-day comfort.

## Description

desertcart.com: KZ AZ09 Bluetooth IEM 5.4 Module IEM Bluetooth Adaper Wireless B-pin 0.78MM for ​KZ ZST/ZSTX/ZS10/AS06/AS10/BA10/ZSR/ES4 : Electronics

Review: Totally sold. - 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.
Review: Sound great, long lasting battery (Used 8 hours+) - Gotta have your own headphones! These work wonderful, if your on one device they have no issue connecting. I have issues with multiple devices. As I am switching between three throughout the day. But the sound quality is very clear. The different ear tips make it comfortable as you want.

## Features

- 𝐁𝐫𝐨𝐚𝐝 𝐂𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐢𝐥𝐢𝐭𝐲- KZ Bluetooth iem adapter provides B-pin 0.78MM/C-pin 0.75MM choices. B-pin 0.78 MM suitable for KZ ZST/ZST-X/EDX/ZSR/ES4/AS10,CCA C10; C-pin 075MM for ZSN PRO/ZSN PRO-X/ZS10 PRO/ZS10 PRO X/ZS12 PRO X/ZS10 PRO 2/EDX PRO/CASTOR/ZAR/PR2/ZAX/AS24/AS24 PRO/ZAS/ZS-X,CCA CRA/C12
- 𝟓.𝟐 𝐁𝐥𝐮𝐞𝐭𝐨𝐨𝐭𝐡 𝐌𝐨𝐝𝐮𝐥𝐞-The iem wireless adapter adopts 5.4 technology which offers you an unparalleled audio experience with faster transmission speed, stronger connection stability. TWS high-definition bluetooth upgrade earhooks, support AAC audio encoding transmission. Hifi sound comes from double protection of chip guard and AAC advanced encoding capabilities.
- 𝐋𝐨𝐧𝐠 𝐁𝐚𝐭𝐭𝐞𝐫𝐲 𝐋𝐢𝐟𝐞-You can get 6 hours usage period per each charge. 800mAh charging case supports 7 times of recharging for both earbuds, gives up to 42 hours continuous music time. Keep you free from mobile charger with music all day!
- 𝐃𝐨𝐮𝐛𝐥𝐞 𝐇𝐨𝐬𝐭- Dual-channel transmission, lower delay. Earhooks can be used individually. The earhook features a high performance mode that gives you faster audio transmission speeds when you play games.
- 𝐋𝐢𝐠𝐡𝐭 𝐖𝐞𝐢𝐠𝐡𝐭 & 𝐏𝐨𝐫𝐭𝐚𝐛𝐥𝐞-Only 4.5g of each earhook, take in ear with 0 pressure. One multi-functional press button for calls, playing, pause and switch music.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D2GYJ7K8 |
| Age Range (Description) | Adult |
| Audio Driver Type | Dynamic Driver |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Battery Life | 6 Hours |
| Best Sellers Rank | #14,901 in Electronics ( See Top 100 in Electronics ) #3,939 in Earbud & In-Ear Headphones |
| Bluetooth Version | 5.2 |
| Cable Feature | Without Cable |
| Carrying Case Material | plastic_or_metal |
| Charging Time | 1 Hours |
| Compatible Devices | Cellphones |
| Connectivity Technology | Wireless |
| Control Method | Remote |
| Control Type | Media Control or Call Control or Volume Control |
| Controller Type | Remote Control |
| Customer Package Type | FFP |
| Customer Reviews | 3.9 3.9 out of 5 stars (131) |
| Date First Available | April 23, 2024 |
| Earpiece Shape | Rounded tips |
| Generation | 9 |
| Hardware Interface | Bluetooth |
| Headphones Jack | No Jack |
| Included Components | Wireless Charging Case |
| Input Device Interface | Bluetooth |
| Item Weight | 0.96 ounces |
| Item model number | KZ AZ09 |
| Manufacturer | EZ EAR |
| Material | Plastic, Silicone |
| Model Name | KZ AZ09 B PIN |
| Noise Control Features | passive_noise_isolation |
| Package Dimensions | 3.39 x 2.99 x 1.54 inches |
| Recommended Uses For Product | Entertainment, Calling |
| Special Feature | Lightweight |
| Specific Uses For Product | Calling, Entertainment |
| Style | Modern |
| Supports Bluetooth Technology | Yes |
| Units | 1.0 Count |
| Water Resistance Level | Waterproof |
| Wireless Communication Technology | Bluetooth |

## Product Details

- **Brand:** EZ EAR
- **Color:** AZ09
- **Ear Placement:** In Ear
- **Form Factor:** In Ear
- **Noise Control:** Sound Isolation

## Images

![KZ AZ09 Bluetooth IEM 5.4 Module IEM Bluetooth Adaper Wireless B-pin 0.78MM for ​KZ ZST/ZSTX/ZS10/AS06/AS10/BA10/ZSR/ES4 - Image 1](https://m.media-amazon.com/images/I/61XEcAvICCL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Totally sold.
*by J***L on January 11, 2026*

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.

### ⭐⭐⭐⭐⭐ Sound great, long lasting battery (Used 8 hours+)
*by A***R on November 18, 2025*

Gotta have your own headphones! These work wonderful, if your on one device they have no issue connecting. I have issues with multiple devices. As I am switching between three throughout the day. But the sound quality is very clear. The different ear tips make it comfortable as you want.

### ⭐⭐⭐⭐ Great value to make use of existing IEMs
*by Y***Y on August 30, 2025*

For some ~10 year old Alclair IEMs, these were cheaper than a standard cable. As I'm not touring anymore, I just wanted to put the IEMs back to use as headphones... To make them work, I had to shave down the plug area as the B-Pin style didn't fit in the jack recess on the Alcairs, but after that modification, they work fine and are snug. Sound quality streaming audio from an iPhone is just fine. It's not perfect, but for the price point, I'm completely satisfied. The case was a bit of a bonus for me when I saw the IEMs should fit in it as well, unfortunately these custom molded IEMs don't both fit while still connected to these adapters, so I need to pull one and just left the IEM sitting in the case. Not the end of the world, but not ideal.

## Frequently Bought Together

- KZ AZ09 Bluetooth IEM 5.4 Module IEM Bluetooth Adaper Wireless B-pin 0.78MM for ​KZ ZST/ZSTX/ZS10/AS06/AS10/BA10/ZSR/ES4
- Linsoul Tripowin Zonie IEM Cable, 16 Core Silver Plated Earphone Upgraded Cords, 1.25m SPC in Ear Monitor Cable for ZS10 PRO 2 AS10 PRO ZSN PRO X Wan’er SIMGOT EM6L(Recessed 2pin, 3.5mm)(Grey)
- InEar Monitor Case for IEM, in Ear Monitors, in Ears, Headphones, Earphones, Earbuds. Suitable for KZ ZS10/ZS10 Pro/ZSN/ZST/ZEX/AS10/AS16,YINYOO CCZ Melody - GIGCASE®

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.fi/products/630372554-kz-az09-bluetooth-iem-5-4-module-iem-bluetooth-adaper](https://www.desertcart.fi/products/630372554-kz-az09-bluetooth-iem-5-4-module-iem-bluetooth-adaper)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-04*