1. Introduction
Thank you for choosing the truke Crystal Dyno True Wireless Earbuds. These earbuds are designed to provide an immersive audio experience with advanced features such as Spatial Audio, long battery life, and clear call quality. This manual will guide you through the setup, operation, and maintenance of your new earbuds.

Image: truke Crystal Dyno True Wireless Earbuds in Oak Brown with their charging case.
2. What's in the Box
Upon unboxing your truke Crystal Dyno Earbuds, please ensure all the following items are present:
- truke Crystal Dyno True Wireless Earbuds
- Wireless Charging Case
- USB Charging Cable
- Eartips (various sizes)
- User Manual (this document)
Image: The truke Crystal Dyno Earbuds, charging case, and accessories included in the package.
3. Setup and First Use
3.1 Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Connect the provided USB charging cable to the charging port on the case and a power source. The LED indicator on the case will show charging status. Once fully charged, the indicator will change or turn off.
Image: The truke Crystal Dyno Earbuds in their charging case, illustrating the 70 hours of playtime and rapid charge feature.
3.2 Pairing with Your Device
- Open the charging case. The earbuds will automatically enter pairing mode, indicated by flashing LED lights on the earbuds.
- On your smartphone or other Bluetooth-enabled device, go to the Bluetooth settings.
- Search for available devices and select "truke Crystal Dyno" from the list.
- Once connected, the LED indicators on the earbuds will stop flashing, and you will hear a confirmation tone.
The earbuds will automatically reconnect to the last paired device when taken out of the case, provided Bluetooth is enabled on your device.
4. Operating Instructions
4.1 Touch Controls
The truke Crystal Dyno Earbuds feature intuitive touch controls on each earbud. Refer to the table below for common functions:
| Action | Function |
|---|---|
| Single Tap (Left/Right) | Play/Pause Music, Answer/End Call |
| Double Tap (Right) | Next Track |
| Double Tap (Left) | Previous Track |
| Triple Tap (Right) | Volume Up |
| Triple Tap (Left) | Volume Down |
| Long Press (2s) (Left/Right) | Activate Voice Assistant, Reject Call |
| Quad Tap (Left/Right) | Toggle Gaming Mode (40ms Ultra Low Latency) |
4.2 Spatial Audio
The earbuds feature 360° Spatial Audio for an immersive listening experience. This feature is automatically enabled when supported content is played. Ensure your device's audio settings are configured to utilize spatial audio if available.
Image: A person enjoying music with the truke Crystal Dyno Earbuds, illustrating the 360° Spatial Sound feature.
5. Maintenance
To ensure the longevity and optimal performance of your truke Crystal Dyno Earbuds, follow these maintenance guidelines:
- Cleaning: Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth. Do not use harsh chemicals or abrasive materials.
- Eartips: Remove eartips periodically and clean them with water and mild soap. Ensure they are completely dry before reattaching.
- Storage: When not in use, store the earbuds in their charging case to protect them from dust and damage.
- Water Resistance: The earbuds are IPX5 water resistant, meaning they can withstand splashes and sweat. Do not submerge them in water or expose them to heavy rain.
6. Troubleshooting
If you encounter any issues with your truke Crystal Dyno Earbuds, please refer to the following common solutions:
| Problem | Solution |
|---|---|
| Earbuds not pairing | Ensure earbuds are charged. Turn off and on Bluetooth on your device. Forget the device in Bluetooth settings and re-pair. |
| Only one earbud working | Place both earbuds back in the case, close it, then open again. Ensure both earbuds are charged. |
| No sound or low volume | Check device volume and earbud volume. Ensure earbuds are properly seated in your ears. Clean any debris from the earbud grilles. |
| Charging issues | Ensure charging cable is securely connected. Try a different USB port or power adapter. Clean charging contacts on earbuds and case. |
| Poor call quality | Ensure microphones are not obstructed. Move to an area with less background noise. |
If the issue persists, please contact customer support.
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | truke Crystal Dyno |
| Model Number | F221 |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.4 |
| Audio Driver Type | 13mm Titanium Dynamic Driver |
| Battery Life | Up to 70 Hours (with charging case) |
| Rapid Charge | 10 minutes charge = 150 minutes playback |
| Low Latency | 40ms Ultra Low Latency |
| Microphones | Quad-mic PureVoice ENC (Environmental Noise Cancellation) |
| Special Features | Spatial Audio, IPX5 Water Resistance |
| Control Method | Remote (Touch Controls) |
| Ear Placement | In Ear |
| Material | Plastic (with Leather Finish case) |
| Item Weight | 41.1 g |
| Product Dimensions | 5 x 5 x 2.6 cm |
8. Warranty and Support
Your truke Crystal Dyno Earbuds come with a 12-month warranty from the date of purchase, ensuring peace of mind and reliable service support. For any warranty claims, technical assistance, or product-related inquiries, please contact truke customer service.
For further information and support, you may also visit the official truke website or refer to your purchase platform's support section.
Image: truke Crystal Dyno Earbuds highlighting 1 year service and 400+ service points.