1. Introduction
Thank you for choosing the LangsDom THETA 13 True Wireless Bluetooth Earphones. These earphones combine a retro sci-fi design with advanced audio technology, offering a comfortable fit, clear sound, and reliable connectivity for various activities. This manual will guide you through the setup, operation, and maintenance of your new earphones.
Package Contents
Please check the box for the following items:
- LangsDom THETA 13 True Wireless Earphones (Left and Right)
- Charging Case
- User Manual
- Charging Cable (USB Type-C)
- USB Type-C Adapter
- Ear Tips (various sizes)
2. Getting Started
Charging the Earphones and Case
Before first use, fully charge the earphones and charging case. The charging case has a built-in 400mAh battery, capable of providing multiple full charges for the earphones. Each earphone has a 40mAh battery.
- Place the earphones into the charging case. Ensure they are correctly seated.
- Connect the USB Type-C charging cable to the charging port on the case and the other end to a DC 5V power source (e.g., a USB wall adapter or computer USB port).
- The indicator light on the charging case will illuminate to show charging status. A full charge for the case takes approximately 1 hour.
- Once fully charged, the indicator light may change or turn off. Disconnect the charging cable.
A fully charged case provides up to 30 hours of total playback time, with individual earphones offering up to 7.5 hours on a single charge.
Pairing with a Bluetooth Device
The earphones use Bluetooth V5.3 for a stable and efficient connection.
- Open the charging case. The earphones will automatically enter pairing mode (indicator lights on earphones may flash).
- On your device (smartphone, tablet, computer), enable Bluetooth.
- Search for "THETA 13" or "THETA PRO" in the list of available Bluetooth devices.
- Select the earphones to connect. Once connected, you will hear a confirmation tone, and the indicator lights on the earphones will turn off or flash slowly.
- The earphones will automatically reconnect to the last paired device when taken out of the case, if Bluetooth is enabled on the device.
3. Operation
Touch Controls
The THETA 13 earphones feature intuitive touch controls on each earbud. While specific gestures are not detailed, common functions include:
- Play/Pause: Single tap on either earbud.
- Answer/End Call: Single tap on either earbud.
- Reject Call: Press and hold either earbud.
- Next Track: Double tap the right earbud.
- Previous Track: Double tap the left earbud.
- Volume Up: Triple tap the right earbud.
- Volume Down: Triple tap the left earbud.
- Activate Voice Assistant (Siri): Press and hold either earbud for 2 seconds.
Note: The product specifications indicate "No Control Button" but "Volume Control: Yes". This implies touch-sensitive areas for control. Please refer to the quick start guide included in your package for exact touch control gestures if available.
Key Features
- ENC Noise Reduction: Intelligent Environmental Noise Cancellation for clear voice calls, effectively shielding environmental noise.
- IP54 Dustproof and Waterproof: Provides protection against dust ingress and splashing water from any direction, making them suitable for sports and outdoor use.
- 45ms Ultra-Low Latency: Optimized for gaming with minimal audio delay, ensuring sound and picture synchronization.
- 10mm Custom High-Sensitivity Composite Diaphragm: Delivers excellent three-frequency sound quality with clear vocals, mellow bass, solid mid-range, and transparent highs.
- Comfortable Fit: Lightweight at 3.6g per earbud with a 30° tilt design for non-inductive wear and long-term comfort.
4. Maintenance
Proper care will extend the lifespan of your earphones.
- Cleaning: Regularly clean the earbuds, ear tips, and charging contacts with a soft, dry, lint-free cloth. Do not use harsh chemicals or abrasive materials.
- Storage: When not in use, store the earphones in their charging case to protect them from dust and damage.
- Water Resistance: The earphones are IP54 rated, meaning they are protected against dust and splashing water. Do not submerge them in water or expose them to heavy rain. Dry them thoroughly if they get wet.
- Avoid Extreme Temperatures: Do not expose the earphones or charging case to extreme temperatures (hot or cold), as this can damage the battery and internal components.
5. Troubleshooting
If you encounter issues with your earphones, try the following steps:
- No Sound/Cannot Pair:
- Ensure both earphones and the charging case are fully charged.
- Make sure Bluetooth is enabled on your device.
- Turn off Bluetooth on your device, then turn it back on and try pairing again.
- Forget "THETA 13" from your device's Bluetooth list and re-pair.
- Try resetting the earphones (refer to the quick start guide for specific reset instructions, if any).
- Only One Earbud Working:
- Place both earbuds back into the charging case, close the lid, wait a few seconds, then open the lid and take them out again.
- Ensure both earbuds are charged.
- Try re-pairing the earphones with your device.
- Charging Issues:
- Check the charging cable and adapter for damage.
- Ensure the charging contacts on the earphones and inside the case are clean and free of debris.
- Try a different USB port or power adapter.
6. Specifications
| Feature | Detail |
|---|---|
| Brand Name | LangsDom |
| Model | THETA 13 / THETA PRO |
| Bluetooth Version | 5.3 |
| Communication | Wireless |
| Wireless Type | Bluetooth |
| Style | In-ear |
| Vocalism Principle | Orthodynamic |
| Active Noise-Cancellation | Yes (ENC for calls) |
| Sound Isolating | Yes |
| Volume Control | Yes |
| With Microphone | Yes |
| Waterproof Rating | IP54 |
| Connectors | Type-C |
| Charging Method | Charging case |
| Earbud Battery Capacity | 40mAh * 2 |
| Charging Case Battery Capacity | 400mAh |
| Total Battery Life | Up to 30 hours (with charging case) |
| Single Charge Playback Time | Up to 7.5 hours |
| Charging Duration | Approx. 1 hour (case) |
| Driver Diameter | 10mm |
| Frequency Response Range | 20Hz - 20KHz |
| Maximum Wireless Range | <10m |
| Earbud Weight | 3.6g |
| Material | ABS |
| Low Latency Mode | 45ms |
| Certification | CE |
7. User Tips
- For optimal sound quality and comfort, experiment with the different sizes of ear tips provided to find the best fit for your ears.
- To maximize battery life, always place the earphones back into the charging case when not in use.
- If experiencing connection issues, ensure there are no major obstructions between the earphones and your device, and stay within the 10m effective range.
- The retro sci-fi design is inspired by Baymax, offering a unique aesthetic.
8. Warranty and Support
LangsDom products are designed and manufactured to the highest quality standards. For any product-related inquiries, technical support, or warranty claims, please contact your retailer or the official LangsDom customer service. Keep your proof of purchase for warranty validation.
