1. Introduction and Overview
The KZ AZ09 Bluetooth 5.2 Earhook Module is designed to transform your wired in-ear monitors (IEMs) into wireless Bluetooth earphones. Featuring IPV5 water resistance and noise reduction capabilities, it offers enhanced audio quality and convenience for a variety of compatible IEMs.
Product Features
- TWS High-Definition Bluetooth: Supports AAC audio encoding transmission for professional sound quality, leveraging chip blessing and advanced encoding capabilities.
- Extended Battery Life: Each earhook has a 50mA battery, and the charging compartment provides an additional 800mA capacity, allowing for approximately 6 hours of use per earhook charge and 7 full recharges from the compartment.
- Bluetooth 5.2 Chip (RTL8753): Ensures stable transmission, lower power consumption, and longer battery life compared to previous versions.
- 2PIN Pluggable Design: Features 0.75mm gold-plated pins, enabling quick conversion of compatible wired earphones into wireless ones.
- Ergonomic Design: Optimized structure for comfortable wearing, reducing weight and improving fit. High-purity oxygen-free copper silver-plated wire ensures lossless audio signal transmission.
- Dual-Channel Transmission: Eliminates the conventional single host setup, offering lower latency and allowing both earhooks to connect to the same mobile phone simultaneously. Earhooks can also be used individually.
- High-Performance Game Mode: Triple-press the button on the earhook to activate a high-performance mode for faster sound signal transmission during gaming.

The KZ AZ09 earhooks provide a seamless wireless experience for compatible wired earphones.

Equipped with a Bluetooth 5.2 chip for stable and efficient wireless connectivity.

Advanced Audio Coding (AAC) technology ensures high-quality sound transmission.
2. Package Contents
Please check the package for the following items:
- KZ AZ09 Bluetooth Earhooks (Left and Right)
- Charging Case
- USB Charging Cable
- User Manual

The KZ AZ09 earhooks and their charging case.
3. Setup
3.1 Charging the Earhooks and Case
Before first use, ensure both the earhooks and the charging case are fully charged.
- Place the KZ AZ09 earhooks into their respective slots in the charging case. Ensure the pins align correctly.
- Connect the USB charging cable to the charging port on the case and plug the other end into a compatible USB power source (e.g., computer USB port, wall adapter).
- The indicator light on the charging case will show charging status. A full charge typically takes a few hours.

The 800mAh charging bin provides extended battery life for the earhooks.

Connect the charging case to a power source using the provided USB cable.
3.2 Attaching Earphones to Earhooks
The KZ AZ09 earhooks are compatible with 2PIN (0.75mm/0.78mm) pin earphones. Carefully align the pins of your earphones with the sockets on the earhooks and push them firmly until they click into place.

The 2PIN design allows for easy conversion of wired earphones to wireless.

The earhooks feature a durable braided cable and standard 2PIN connectors.
3.3 Bluetooth Pairing
To pair your KZ AZ09 earhooks with a device:
- Ensure the earhooks are charged and removed from the charging case. They will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), go to the Bluetooth settings and turn Bluetooth on.
- Search for available devices. You should see "AZ09" in the list.
- Select "AZ09" to connect. Once connected, a voice prompt will confirm "Connected".
- The earhooks support dual-channel transmission, meaning both can connect simultaneously, or they can be used individually.

The dual-host design allows for independent use and stable connection.

Easily connect your earhooks to your mobile device via Bluetooth.
4. Operating Instructions
4.1 Button Functions
Each earhook features a multi-function button for controlling playback, calls, and modes:
| Action | Function |
|---|---|
| Press Once | Play/Pause music, Answer/Hang up a call |
| Double-click Left Touch Key | Previous Song |
| Double-click Right Touch Key | Next Song |
| Long Press Touch Key (2 seconds) | Start Voice Assistant (Siri, Google Assistant) |
| Long Press for Calling | Reject Call |
| Triple-press Button | Enter High-Performance Game Mode |

Overview of the multi-function button controls.
4.2 Wearing the Earhooks
The KZ AZ09 earhooks are designed for ergonomic comfort. Gently place the earhook over your ear, ensuring the attached earphone sits comfortably and securely in your ear canal. Adjust the earhook for a snug fit.

The ergonomic design ensures a comfortable and secure fit during various activities.
4.3 High-Performance Game Mode
For an optimized gaming experience with lower latency, triple-press the button on either earhook to activate the high-performance game mode. This mode prioritizes faster sound signal transmission.

Activate high-performance mode for an enhanced gaming audio experience.
5. Maintenance
5.1 Cleaning
Regular cleaning helps maintain the performance and longevity of your KZ AZ09 earhooks:
- Use a soft, dry, lint-free cloth to wipe the surface of the earhooks and charging case.
- For the earphone connectors, use a cotton swab lightly dampened with isopropyl alcohol to gently clean any debris. Ensure no liquid enters the internal components.
- Do not use abrasive cleaners, solvents, or aerosol sprays.
5.2 Storage
When not in use, store the earhooks in their charging case to protect them from dust, damage, and to keep them charged. Store in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
If you encounter issues with your KZ AZ09 earhooks, please refer to the following common solutions:
| Problem | Possible Solution |
|---|---|
| Earhooks not pairing/connecting |
|
| No sound or low volume |
|
| Intermittent connection/audio dropouts |
|
| Earhooks not charging |
|
Troubleshooting Video: AZ09 Operation
This video demonstrates key operational aspects, including potential troubleshooting steps like resetting the earhooks.
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | AZ09 |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.2 |
| Bluetooth Range | 10 Meters |
| Earhook Battery Capacity | 50mA (per earhook) |
| Charging Case Battery Capacity | 800mA |
| Battery Life (Earhook) | Approx. 6 Hours |
| Water Resistance Level | IPV5 Waterproof |
| Frequency Range | 20 Hz - 20,000 Hz |
| Control Type | Touch / Button |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Item Weight | 23 Grams (approx. 0.811 ounces) |
| Product Dimensions | 0.87 x 0.71 x 0.83 inches |
| Manufacturer | yuanze |
| Compatible Pin Type | 0.75mm / 0.78mm 2PIN |
8. Warranty and Support
KZ products are manufactured to high quality standards. For warranty information and technical support, please refer to the warranty card included with your product or visit the official KZ website. Keep your purchase receipt as proof of purchase.
For further assistance, you may also contact the seller directly through the platform where you purchased the product.
Visit the official KZ Store: KZ Official Store