1. Introduction
The KZ AZ09 Bluetooth Wireless Upgrade Cable transforms your wired in-ear monitors (IEMs) into wireless Bluetooth earphones. Designed for audiophiles, it features a high-fidelity (HIFI) sound experience, a comfortable ear hook design, and comes with a portable charging case. This manual provides detailed instructions for setup, operation, maintenance, and troubleshooting.
Note: The KZ AZ09 has been upgraded from Bluetooth 5.2 to Bluetooth 5.4. The charging case capacity has changed from 800mA to 400mA. New and old versions may be shipped randomly. This product does not include earphones.
Video: KZ AZ09 Product Overview and Features
2. Package Contents
- KZ AZ09 Bluetooth Ear Hooks (Left and Right)
- Charging Case
- User Manual (this document)
Note: Earphones and charging cable are NOT included.
Image: KZ AZ09 Bluetooth Ear Hooks and Charging Case
3. Specifications
| Feature | Specification |
|---|---|
| Product Name | KZ-AZ09 |
| Bluetooth Version | 5.2 / 5.4 (Shipped randomly) |
| Bluetooth Range | 15 meters |
| Ear Hook Weight | 4.5g (single) |
| Charging Case Weight | 85g |
| Ear Hook Battery Capacity | 50mA |
| Charging Case Battery Capacity | 800mA / 400mA (Shipped randomly) |
| Material | Plastic (Skin-friendly resin) |
| Charging Method | Charging case |
| Audio Codecs | AAC |
| Microphone | Yes |
| Waterproof | Yes |
| Control Button | Yes |
| Volume Control | Yes |
| Active Noise-Cancellation | No |
| Support APP | No |
| Vocalism Principle | Other |
| Wireless Type | Bluetooth |
| Certification | CE |
| Origin | Mainland China |
Image: Product Specifications (New Version)
4. Compatibility
The KZ AZ09 is compatible with 0.75mm/0.78mm pin earphones. Please identify the corresponding pin interface (B pin or C pin) for your headphone model before purchasing.
Image: AZ09 C PIN Connector
Image: AZ09 B PIN Connector
Refer to the table below for common compatible headphone models:
Image: Compatible Headphone Models Table
5. Setup
5.1 Connecting Ear Hooks to Earphones
- Identify the correct pin type (B or C) for your earphones.
- Align the pins of the ear hook with the sockets on your earphones.
- Gently push the ear hook into the earphone until it is securely connected. Ensure a firm connection to prevent signal loss.
Image: Wired to Wireless Earphones Conversion
5.2 Initial Charging
Before first use, fully charge the KZ AZ09 ear hooks and charging case. Place the ear hooks into the charging case. Connect the charging case to a power source using a USB-C charging cable (not included). The indicator light on the charging case will show charging status.
5.3 Wearing Instructions
- Correctly distinguish the left and right ear hooks. Check the logo: "L" applies to the left ear, and "R" applies to the right ear.
- Connect the Bluetooth ear hook to your earphone.
- Put the earphone into the mouth of the ear canal, push it gently, and push it straight in the ear.
- Put the ear hook on the back of the ear and slightly rotate it to adjust the sealing and comfort of the earphone for better audio experience.
Image: Correct Wearing Instructions Diagram
5.4 Bluetooth Pairing
- Ensure the ear hooks are charged and powered on. They will automatically enter pairing mode when taken out of the charging case.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for available Bluetooth devices.
- Select "AZ09" from the list to connect.
- Once connected, the ear hooks are ready for use. The dual-host dual channel transmission technology allows for faster response and individual use of each ear hook.
Image: Dual-host Dual Channel Transmission Technology Pairing
6. Basic Operation (One-Click Control)
The KZ AZ09 features intuitive one-click controls for various functions:
- Play / Pause: Click the button once.
- Previous Song: Double-click the left ear hook button.
- Next Song: Double-click the right ear hook button.
- Start Voice Assistant (Siri): Long press the button for 2 seconds.
- Answer / Hang Up Call: Touch the switch once during an incoming call or active call.
- Refuse to Answer Call: Long press the button on an incoming call.
Image: Basic Operation One-Click Control
7. Charging and Battery Life
The Bluetooth ear hooks can be used for about 6 hours on a fully charged state. The charging case can provide 4 to 10 full charges for the ear hooks, depending on the version (400mA or 800mA capacity).
7.1 Charging Indicators
- When the battery is low: The indicator light will flash red 4 times every 30 seconds.
- When charging: The indicator light will be red.
- When fully charged: The indicator light will be green.
Important: To ensure the service life and safety of the equipment, do not use a fast charger for charging. Use a standard 5V-1A charger.
Image: Battery Life and Charging Indicators
8. User Tips
- Microphone Functionality: Yes, the KZ AZ09 adapter includes a microphone for calls.
- Battery Life: Expect approximately 6 hours of continuous playback from the ear hooks. The charging case provides multiple recharges, extending total usage time significantly.
- Compatibility Check: Always verify the pin type (B or C) required for your specific earphone model using the compatibility table provided in this manual or by consulting customer service.
- Charging Best Practice: Use a standard 5V-1A charger to prolong battery life and ensure safety. Avoid fast chargers.
9. Troubleshooting
9.1 Common Issues and Solutions
- No Sound / Disconnection:
- Ensure the ear hooks are fully charged.
- Verify that the ear hooks are securely connected to your earphones.
- Check if Bluetooth is enabled on your device and if the AZ09 is paired.
- Try unpairing and re-pairing the AZ09 with your device.
- Ensure no other devices are interfering with the Bluetooth connection.
- Ear Hooks Not Charging:
- Ensure the charging case is charged.
- Check if the ear hooks are correctly seated in the charging case.
- Verify the charging cable and power adapter are working correctly.
- Clean the charging contacts on both the ear hooks and the case.
- Cannot Pair:
- Make sure the ear hooks are in pairing mode (usually indicated by a flashing light).
- Turn off Bluetooth on other nearby devices to avoid interference.
- Try resetting the ear hooks (see section 9.2).
9.2 Resetting the Device
If you experience persistent issues, a factory reset may resolve them. Please refer to the following video for instructions on how to reset your KZ AZ09:
Video: KZ AZ09 Reset Instructions
10. Maintenance and Care
- Cleaning: Use a soft, dry cloth to clean the ear hooks and charging case. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the device in its charging case when not in use to protect it from dust and damage. Keep it in a cool, dry place away from direct sunlight and extreme temperatures.
- Water Resistance: The device is waterproof, but it is not recommended to submerge it in water or expose it to heavy rain for extended periods. Dry thoroughly if it gets wet.
- Charging Port: Keep the USB-C charging port clean and free of debris.
11. Safety Information
- Do not disassemble, repair, or modify the device. This may cause fire, electronic breakdown, or complete damage to the product.
- Keep the device away from extreme temperatures, humidity, and corrosive environments.
- Do not expose the device to open flames or dispose of it in fire.
- Keep out of reach of children and pets.
- Avoid using the device at excessively high volumes for prolonged periods to prevent hearing damage.
- Use only recommended charging voltage (5V-1A) to prevent damage to the battery and device.
12. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your proof of purchase for any warranty claims.
