1. Product Overview
The KZ ZEX Pro is an advanced in-ear HIFI headset that combines Electrostatic, Dynamic, and Balanced Armature units to deliver a wide and natural sound field. Designed for discerning audio enthusiasts, these earphones offer high-resolution audio performance and enhanced high-frequency ductility.

Key Features:
- Hybrid Driver Configuration: Integrates Low Voltage Electrostatic, Double Magnetic Dynamic, and Balanced Armature units for superior sound.
- Wide Sound Field: Delivers exceptional high-frequency performance and rich audio details.
- Durable Design: Features an aviation-grade zinc alloy radium carving surface cover and a skin-friendly translucent resin cavity.
- Ergonomic Fit: Designed based on extensive ear data models for a comfortable, secure fit and effective noise isolation.
- Upgradable Cable: Equipped with a 2-pin connector for easy cable replacement or upgrade to a KZ Bluetooth cable (sold separately).
- High-Quality Cable: Includes an upgraded professional silver-plated double flat cable for enhanced resolution and pure sound.
- HD Condenser Microphone: Compatible with standard mobile phone HD calls (available on models with microphone).

Advanced Acoustic Technology:
The 6.8mm Electret Low-Voltage Electrostatic Unit generates an electrostatic field that drives an extremely thin diaphragm, producing sound with superior performance and stable quality consistency compared to other sounding units.


2. Specifications
| Feature | Detail |
|---|---|
| Product Model | KZ-ZEX Pro |
| Material | Metal (Zinc alloy cover) |
| Vocalism Principle | Electrostatic, Dynamic, Balanced Armature (Hybrid) |
| Impedance | 28 Ω |
| Sensitivity | 104 dB |
| Frequency Response Range | 20 - 40000 Hz |
| Communication | Wired (can be upgraded to Bluetooth with separate cable) |
| Connectors | 3.5 MM |
| Plug Type | L Bending |
| Pin Type | 0.75mm (2-pin upgrade connector) |
| Cable | Silver-plated double flat cable |
| Cable Length | 120 ± 5 mm |
| Style | In-ear |
| With Microphone | Yes (model dependent) |
| Active Noise-Cancellation | No |
| Volume Control | No |
| Control Button | Yes (model dependent) |
| Waterproof | No |
| Support APP | No |
| Certification | CE |
| Origin | Mainland China |


3. Setup and Wearing
Connecting the Cable:
- Identify the left and right earpieces.
- Align the 0.75mm gold-plated pins of the silver-plated double flat cable with the 2-pin sockets on each earpiece.
- Gently push the pins into the sockets until they are securely connected. Ensure a firm connection to prevent signal loss. The design includes increased cable protection to prevent pin breakage.

Wearing the Earphones:
- Select the appropriate ear tips for your ear size to ensure a comfortable and secure fit.
- Insert the earpieces into your ears, ensuring they sit snugly in the ear canal. The ergonomic design is crafted for a fitting cochlear design.
- Route the cable over your ear for added stability and to minimize microphonics (cable noise).
- Adjust the cable length as needed for comfort.
The customized wearing experience, based on extensive ear data models, ensures a comfortable, safe fit and effective noise isolation.

4. Operating Instructions
Using the Control Button (if equipped with microphone):
The HD condenser microphone is compatible with standard mobile phone HD calls and features an inline control button for easy management of calls and music playback.
- Short press: Answer an incoming call / Play or Pause music.
- Press again (during a call): Hang up the call.
- Long press: Reject an incoming call.
- Press twice: Skip to the next song.
- Press 3 times: Go to the last song.

5. Maintenance and Care
Cleaning:
- Gently wipe the earpieces and cable with a soft, dry cloth.
- Remove ear tips and clean them with mild soap and water if necessary. Ensure they are completely dry before reattaching.
- Do not use harsh chemicals or abrasive materials, as this may damage the earphones.
Cable Care:
The upgraded silver-plated double flat cable is designed for durability, with stress tests exceeding 50,000 times. However, proper handling will extend its lifespan:
- Avoid sharp bends or excessive pulling on the cable.
- When disconnecting, always pull from the plug or the 2-pin connector, not the cable itself.
- Store the cable neatly to prevent tangling.

Storage:
- Store your KZ ZEX Pro earphones in a clean, dry place, preferably in a protective case, when not in use.
- Avoid exposing them to extreme temperatures, humidity, or direct sunlight.
6. Troubleshooting
No Sound or Intermittent Audio:
- Check Connections: Ensure the 2-pin cable connectors are fully inserted into the earpieces and the 3.5mm jack is securely plugged into your audio source.
- Audio Source: Test with a different audio device to rule out issues with your phone, player, or computer.
- Cable Damage: Inspect the cable for any visible damage or kinks.
- Ear Tips: Ensure ear tips are properly seated on the nozzles and creating a good seal in your ear.
Poor Sound Quality:
- Ear Tip Seal: A poor seal can significantly impact bass response and overall sound quality. Try different sized ear tips.
- Audio Source Quality: Ensure your audio files or streaming quality are high resolution.
- Cable Condition: A damaged cable can degrade sound quality.
Microphone Not Working (if applicable):
- Device Compatibility: Ensure your device supports inline microphone controls.
- Connection: Verify the 3.5mm jack is fully inserted into your device.
- Device Settings: Check your device's audio input settings to ensure the external microphone is selected.
If you continue to experience issues, please refer to the Warranty and Support section for assistance.
7. Warranty and Support
Return Policy:
This product is eligible for free returns within 90 days of purchase. Please refer to the seller's return policy for detailed instructions.
Delivery Guarantee:
The seller offers a fast delivery guarantee. In case of delayed delivery, a $1.00 coupon code may be collected. Refunds are available if the package is lost, items are damaged, or if delivery is not completed within 60 days.
Security & Privacy:
Your personal details are protected and kept secure. The seller does not share your personal information with third parties without your consent.
Customer Support:
For any further questions, technical support, or warranty claims, please contact the KZ Official Store directly through the platform where you made your purchase. Provide your order number and a detailed description of the issue for prompt assistance.





