CXK CT13
CXK CT13 Open Ear Earbuds Bluetooth 5.4 User Manual
Model: CT13
1. Introduction
Thank you for choosing the CXK CT13 Open Ear Earbuds. These true wireless headphones are designed to provide a comfortable listening experience while maintaining awareness of your surroundings. Featuring Bluetooth 5.4 connectivity, a lightweight design, and IPX6 water resistance, they are suitable for various activities.

Image: The CXK CT13 Open Ear Earbuds, showing both earbuds and their charging case with a digital battery display.
2. What's in the Box
Please check the package contents to ensure all items are present:
- CXK CT13 Open Ear Earbuds (x1 pair)
- Charging Case (x1)
- USB-C Charging Cable (x1)
- User Manual (x1)

Image: An illustration showing the CXK CT13 earbuds, charging case, USB-C cable, and user manual, representing the package contents.
3. Setup
3.1 Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. The charging case features a digital display to show the battery percentage.
- Place the earbuds into the charging case. Ensure they are correctly seated.
- Connect the USB-C charging cable to the charging port on the case and to a power source.
- The digital display on the case will show the charging status.
- A full charge provides approximately 12 hours of listening time for the earbuds, with the charging case extending total playtime to up to 60 hours.

Image: The CXK CT13 earbuds in their charging case, illustrating the 12-hour single charge and 60-hour total playtime with the case.
3.2 Wearing the Earbuds
The CXK CT13 earbuds feature an open-ear design with flexible ear hooks for a secure and comfortable fit. This design allows you to hear your audio while remaining aware of your surroundings.
- Hang the end of the earbud on your ear helix.
- Rotate the earbud backward along the auricle.
- Adjust the ear hook until the headset is worn stably and comfortably.

Image: A three-step diagram demonstrating the correct method for wearing the CXK CT13 open-ear earbuds for a secure and comfortable fit.
3.3 Bluetooth Pairing
The earbuds utilize Bluetooth 5.4 for a stable and efficient wireless connection.
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for "CT13" in the list of available Bluetooth devices.
- Select "CT13" to connect. Once connected, you will hear an audible confirmation.
- The earbuds will automatically reconnect to the last paired device when removed from the case, if Bluetooth is enabled on the device.

Image: A visual representation of the Bluetooth 5.4 chip, highlighting its role in providing a seamless wireless connection with ultra-low latency and an extended range of up to 33 feet.
4. Operating the Earbuds
4.1 Button Controls
The CXK CT13 earbuds feature intuitive physical buttons to prevent accidental presses. Refer to the following table for control functions:
| Action | Function |
|---|---|
| Click either earbud button once | Answer/End a call, Play/Pause music |
| Double click L/R earbud button | Previous/Next Song |
| Long press R/L earbud button | Volume +/- |
| Triple click either earbud button | Call voice assistant |
| Long press either earbud button for 2 seconds | Reject call |

Image: A visual guide detailing the various button controls on the CXK CT13 earbuds for managing calls, music playback, volume, and voice assistant.
4.2 Sound Quality and Microphone
The earbuds are equipped with 13mm dynamic acoustic speakers for clear audio. Directional acoustics technology helps to focus sound towards your ears, minimizing sound leakage. The built-in microphones feature clear voice capture technology for improved call quality.

Image: A detailed diagram showcasing the 13mm dynamic acoustic speakers within the CXK CT13 earbuds, highlighting their design for superior sound.

Image: An illustration demonstrating the directional acoustics technology of the CXK CT13 earbuds, showing how sound waves are accurately directed to the ear to reduce leakage.
5. Maintenance
5.1 Cleaning and Storage
To ensure the longevity and optimal performance of your earbuds:
- Wipe the earbuds and charging case regularly with a soft, dry cloth.
- Avoid using abrasive cleaners or solvents.
- Store the earbuds in their charging case when not in use to protect them from dust and damage.
- Keep the charging contacts clean and dry.
5.2 Water Resistance
The earbuds are IPX6 water-resistant, meaning they can withstand strong jets of water. This makes them suitable for workouts and light rain. However, they are not designed for submersion in water.
- Do not submerge the earbuds in water.
- Do not wear them while swimming or showering.
- If the earbuds get wet, dry them thoroughly before placing them back in the charging case or attempting to charge them.

Image: The CXK CT13 earbuds with water droplets, illustrating their IPX6 water-resistant rating, suitable for sweaty workouts without interruption.
6. Troubleshooting
If you encounter issues with your CXK CT13 earbuds, try the following solutions:
6.1 Earbuds Not Pairing
- Ensure the earbuds are charged.
- Make sure Bluetooth is enabled on your device.
- Place the earbuds back in the case, close the lid, then open it again to re-enter pairing mode.
- Forget/delete "CT13" from your device's Bluetooth list and try pairing again.
- Try pairing with a different device to rule out device-specific issues.
6.2 No Sound or Low Volume
- Check the volume levels on both your device and the earbuds.
- Ensure the earbuds are properly connected to your device.
- Clean any debris from the speaker grilles.
- Try playing audio from a different application or source.
6.3 Charging Issues
- Ensure the charging cable is securely connected to both the case and the power source.
- Try using a different USB-C cable and power adapter.
- Clean the charging contacts on both the earbuds and inside the case.
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | CT13 |
| Bluetooth Version | 5.4 |
| Battery Life (Earbuds) | Up to 12 hours (single charge) |
| Total Playtime (with Case) | Up to 60 hours |
| Water Resistance Rating | IPX6 |
| Item Weight | 0.27 oz (per earbud) / 4.2 ounces (total package) |
| Speaker Size | 13mm Dynamic Acoustic Speakers |
| Connectivity | Wireless (Bluetooth) |
| Manufacturer | Shenzhen Jiechen Technology Co.LTD |
8. Safety Information
- Hearing Safety: To avoid hearing damage, do not listen at high volume levels for extended periods.
- Driving Safety: Do not use earbuds while driving or cycling in situations where the inability to hear ambient sounds could pose a danger.
- Water and Moisture: While IPX6 water-resistant, avoid prolonged exposure to water or submersion. Ensure earbuds are dry before charging.
- Children: Keep earbuds and small parts away from children to prevent choking hazards.
- Disposal: Dispose of the product responsibly according to local regulations. Do not dispose of with household waste.
9. Warranty and Support
For warranty information, please refer to the documentation included with your product packaging or visit the official CXK website. For customer support, please contact the seller or manufacturer directly.
You can also visit the CXK Store on Amazon for more product information and support resources.
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