---
product_id: 700504304
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: "NT$2444"
currency: TWD
in_stock: true
reviews_count: 5
category: "Ez Ear"
url: https://www.desertcart.tw/products/700504304-kz-az09-bluetooth-iem-5-4-module-iem-bluetooth-adaper
store_origin: TW
region: Taiwan
---

# Bluetooth 5.4 tech B-pin 0.78mm compatibility 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:** NT$2444
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your wired IEMs to wireless freedom with KZ AZ09 — because your sound deserves the upgrade!

## 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?** NT$2444 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/700504304-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:** 6 hours per charge plus 7 full recharges from the compact 800mAh case means up to 42 hours of uninterrupted sound.
- • **Universal KZ Compatibility:** Supports B-pin 0.78mm for a wide range of KZ IEMs including ZST, ZSR, AS10, and more—upgrade your wired buds to wireless effortlessly.
- • **HiFi Sound with AAC Encoding:** Experience crystal-clear audio with advanced AAC codec and chip guard protection for premium sound clarity.
- • **Seamless Multi-Device Switching:** Dual-host Bluetooth 5.4 ensures ultra-stable, low-latency connections across your devices—never miss a beat or call.
- • **Tailored Fit, Featherweight Comfort:** At just 4.5g per earhook with multiple ear tip options, enjoy pressure-free wear that keeps you focused and stylish.

## Overview

The KZ AZ09 Bluetooth 5.4 Module is a lightweight, wireless adapter designed for KZ IEMs with B-pin 0.78mm connectors. It delivers up to 6 hours of playback per charge and a total of 42 hours with its 800mAh charging case. Featuring dual-host connectivity for seamless device switching, AAC audio codec support for high-fidelity sound, and a comfortable, ergonomic design, it transforms your wired earphones into a versatile wireless audio solution.

## Description

Brand: KzModel: AZ09Host: DoubleBattery usage time: 6 hours/1charge

Review: The sound quality is poor, plus I received it with no charging cable.
Review: 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/ZSTX/ZSTX/EDX/ZSR/ES4/AS10/ED12/ES3/AS06/BA10; C-pin 075MM for ZSN/ZSN PRO/ZSN PRO-X/ZS10 PRO/ZS10 PRO X/EDX PRO/AS16/AS16 PRO/PR2/ZEX PRO/AS12/AS24/DQS/C12/C10 /CRA.
- 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 |
| Best Sellers Rank | #82,981 in Electronics ( See Top 100 in Electronics ) #841 in Headphone Adapters |
| Cable feature | Without Cable |
| Charging time | 1 Hours |
| Compatible devices | Cellphones |
| Connectivity technology | Wireless |
| Control method | Remote |
| Control type | Media Control or Call Control or Volume Control |
| Headphone jack | No Jack |
| Included components | Wireless Charging Case |
| Item model number | KZ AZ09 |
| Item weight | 27 g |
| Manufacturer | EZ EAR |
| Model name | KZ AZ09 B PIN |
| Package Dimensions | 8.61 x 7.59 x 3.91 cm; 27.22 g |
| Package type | FFP |
| Recommended uses for product | Entertainment, Calling |
| Specific uses for product | Calling, Entertainment |
| Style | Modern |
| Unit count | 1.0 Count |
| Water resistance level | Waterproof |
| Wireless communication technologies | Bluetooth |

## Product Details

- **Brand:** EZ EAR
- **Colour:** 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)

## Customer Reviews

### ⭐⭐ Review
*by R***N on 11 July 2025*

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

### ⭐⭐⭐⭐⭐ Review
*by A***R on 18 November 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.

### ⭐⭐⭐⭐⭐ Review
*by S***A on 27 October 2024*

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

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.tw/products/700504304-kz-az09-bluetooth-iem-5-4-module-iem-bluetooth-adaper](https://www.desertcart.tw/products/700504304-kz-az09-bluetooth-iem-5-4-module-iem-bluetooth-adaper)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-01-25*